A List of the most common used audio file formats / extensions in alphabetical order:

(.32) - Yamaha DX-series SysEx dumps (FM-synthesis instruments.)

(.3GP/.3GPP) file format: The .3GA file extension is used by 3GPP multimedia format files. 3GPP stands for "3rd Generation Partnership Program" and is a multimedia container format developed for 3G wireless carrier services such as MMS, PSS or IMS.3GA files identify only the audio stream saved in the 3GPP container. They are similar to 3GP files, which are used for capturing both audio and video content. Both formats are used for transmitting recordings over the Internet between 3G Smartphones and are supported by many types of devices such as Nokia or Samsung. Features:  .3GP: AMR, mono, text info.

(.3G2) - 3GPP 'project 2' file format: Features: 3G2: AMR / MPEG-4 AAC, mono / stereo.

(.404) - Muon DS404 bank/patch files: Features: 16-bits mono, loop, name, articulation, sample start & end offsets, multiple filter types.

(.AA) - Audible Audio: is an audio file format developed by Audible.com,  used for storing and distributing audio books sold on their website.The books on Audible.com can be downloaded in different versions and sound qualities, and the AA format is used for the lower quality audiobook versions, contrary to AAX, which is the higher quality alternative to the AA format.In its essence, the audio data stored in AA files is encoded at low bit rates using either MP3 or AAC encoding. However, what makes AA files different from standard MP3 and AAC files is that they may also contain meta data (such as chapter markers, bookmarks etc.) and that they also utilize copy-protection through a proprietary digital rights management (DRM) technology.To further ensure that copying AA files is as hard as possible, Adubile.com keeps the exact AA file format specification closed to the public, making it extremely hard for third-party developers to break the DRM encryption and invent tools that allow you to grab the necessary audio data and convert it to a popular open audio format like MP3 for example. Therefore playback of AA files is heavily limited to a narrow set of Audible-ready devices such as the Amazon Kindle or the Apple iPod.Nevertheless, there are a few clever tricks, such as playing the AA file through Windows Media Player and capturing the stereo output of your sound interface with Audacity in order to grab the audio data and export it to a more convenient audio format that can be played on any portable media player.

(.AA3) - ATRAC3 Audio: is a proprietary compressed audio file format developed by the Sony Corporation and used extensively in most of their audio and video editing applications such as Sony Vegas, Sony Sound Forge and Sony ACID. The AA3 format is also a common choice among game developers for storing game sounds and is also used for storing audio data on CDs and MiniDiscs.Audio data stored in AA3 files is encoded with the Adaptive Transform Acoustic Coding (ATRAC) algorithm. The ATRAC algorithm was originally developed in 1992 by the engineers from Sony, working in close cooperation with engineers from the LSI Corporation, having the aim to create an algorithm that allows encoding at high speeds with the lowest possible amount of power consumption (one of the reasons why, for example, batteries on Sony Walkmans last longer when playing ATRAC files rather than MP3).This led to the successful implementation of the ATRAC1 algorithm. With the addition of numerous improvements to the codec, ATRAC3 saw its release in 1999, followed by ATRAC3plus in 2002. AA3 files are based on the ATRAC3 and ATRAC3plus algorithms.ATRAC3 is a complex sub-band coding algorithm, where the raw signal is split into four sub-bands through three stacked quadrature mirror filters (QMF). Modified discrete cosine transform (MDCT) is then applied to each sub band, leading to a further compression of the signal. On the other hand, ATRAC3plus relies on 16-channel QMF filtering, followed by Generalized Harmonic Analysis (GHA) and a 128-point MDCT. Naturally, ATRAC3plus provides better audio quality compared to ATRAC3 and is therefore used on a broader set of devices, such as the Sony PlayStation 3 and Sony Hi-MD Walkmans. The major downside of the AA3 format is that it lacks decent cross-platform support.

(.AAC) - Advanced Audio Coding file format: is most commonly known as the default audio format for Apple's iPhone and iPod devices, as well as being the format used by the iTunes store. It is also the standard format for Sony's PlayStation 3.The .ACC format supports extensions for proprietary digital rights management (DRM) meaning you'll need an ACC player that supports these extensions if you wish to play these files in anything other iTunes.Compared to the MP3 format, the AAC audio format produces better quality audio at the same bit-rate.

(.AAX) - Audible Enhanced Audiobook format files: which may be played by the iTunes software program. However, AAX files contain enhancements over the standard AA audiobook format in that the AAX file may contain links and images, making it especially attractive for children's books. AAX files are an archive format that includes a timeline and images and shows them at the appropriate time to the listener.

(.ABC) - Extension: is used by ABC music files, which use text to represent musical scores.

(.AC3) - Audio Codec 3: is an audio file format developed by the Dolby Laboratories used for storing surround sound audio for playback on modern Dolby Digital 5.1 home theater surround sound systems. For that purpose, AC3 files may contain up to six channels of compressed audio data, with five of them meant to carry information for normal range speakers and a sixth channel being reserved strictly for subwoofer operation.Audio data stored in AC3 files is encoded with the Dolby AC-3 algorithm, which is Dolby's third generation audio encoding algorithm. It is a lossy compression algorithm based on the technique of perceptual coding, which produces audio with higher fidelity than the preceding Dolby Pro-Logic technology.AC3 audio is used on nearly all modern digital mediums like DVD and Blu-Ray. For proper playback, home theater systems need to be equipped with an amplifier compatible with the Dolby Digital technology. On desktop computers, proper AC3 support is largely dependent on the sound interface. Certain sound cards cannot interpret AC3 streams properly and output a PCM stream instead, while others come with native support to AC3 surround sound audio. Devices that do not come with built-in support to the AC3 codec can use a software processing application, like the AC3Filter, to be able to provide proper playback to multimedia files containing AC3 audio.

(.ACD) - ACD extension: are known as Acid Project files; however, other file types may also use this extension.

(.ACM) - InterPlay ACM Audio: is a special compressed audio file format extensively used for storing sound effects and human speech for most of the 2D role-playing game titles published by InterPlay Entertainment in the late 1990s and early 2000s. Some of these games include Fallout, Baldur's Gate, Icewind Dale and Planescape Torment. While the encoding scheme used in ACM files doesn't achieve that good compression ratio compared to MP3, Vorbis or any other of the popular audio compression formats, ACM files require less system resources for decoding, which made them an optimal choice for the games from that period, which were pushing the computer hardware to its limits for the time.Although there is no official statement to confirm that, it is assumed that BioWare originally developed the ACM format, since all of the games using it were based on BioWare's Infinity Game Engine. A typical ACM file consists of two main parts - a short header, containing important metadata, and an ACM-Stream, containing packed data blocks. The header starts with a special ACM-Signature defining the exact version of the ACM file, followed by information about the total number of samples and channels stored in the file and its bitrate. Although in theory these parameters may vary, in practice all ACM files are either 16-bit mono or 16-bit stereo at 22050 Hz. The ACM-Stream section consists of special data structures called BitBlocks that contain the encoded audio data. BitBlocks can have a variable length and can be unpacked into a variable number of samples, which, when combined together, reconstruct the encoded raw audio data.ACM files are generally not natively supported by media players. However, there are a number of applications developed such as ACM2WAV and ACMPlayer for Windows and libacm for Linux, which allow playback and conversion of ACM files to more common formats, such as WAV.

(.ACT) - File extension: ACT are associated with 'Mikomi' voice dictation machines (voice recorders). .ACT files store the recorded audio footage to the dictation machines internal memory, which can then be transferred to PC via USB. One model known to use the .ACT format is the 'Mikomi ET-880'.

(.ADG) - ADG extension:  are known as Ableton Device Group files; however, other file types may also use this extension.

(.ADTS) - Audio Data Transport Stream: is a container format for audio data encoded with the Advanced Audio Coding (AAC) encoding scheme, originally introduced with the MPEG-2 specification. The Advanced Audio Coding scheme is a lossy compression scheme, which was developed with the intention of replacing the MP3 encoding format as a standard. However, while AAC-encoded files were achieving better sound quality in smaller file sizes compared to MP3 files at similar bit rates, the MP3 format was supported by a wider range of applications and devices, leaving it in a dominant position.While AAC can be encountered as a stand-alone extension, AAC-encoded data stored in ADTS files is used particularly for real-time audio streaming in online radio applications and the like. In contrast to other popular streaming formats, an ADTS file consists of series of frames, each containing header data followed by the compressed audio data. This file structure makes the ADTS an ideal audio streaming format, as it makes it easier on software applications to read the stream at any given point of its broadcast.Since AAC encoding was also featured in the updated MPEG-4 specification, it is not unusual to also discover AAC-encoded audio data stored in MPEG-4 (MP4) container files.

(.AFC) - Mass Effect Audio File Container: is an audio container format developed by Canadian video game development company BioWare for their Mass Effect science fiction video game series based on the Unreal 3 Engine.Being a container format, an AFC file can contain one or multiple audio streams. The audio data stored in AFC files may represent either speech, background music and/or sound effects used in the game.In its essence, an AFC file is just a regular OGG file with audio data encoded as RIFF WAVE via the WaveWorks Interactive Sound Engine (Wwise). The only thing that makes AFC files different from regular OGG files is the file header, which is slightly different.AFC files usually have a sampling rate of about 32000Hz at a variable bit rate (VBR) ranging from 75 to about 105kbps. There are currently no desktop media players that provide AFC playback natively. However, there is a good number of independently developed AFC conversion tools such as afc2ogg or the Gibbed Mass Effect 3 Audio Extractor, which allow users to easily convert AFC files to OGG and play them back in any OGG-compatible desktop media player.

(.AHX) - AHX extension: are known as WinAHX Tracker Module files; however, other file types may also use this extension.

(.AIF/.AIFC/.AIFF) - Audio Interchange File Format: The .AIF file format is used on computers and other electronic audio devices. The format is uncompressed and lossless (no reduction in quality) and because of this, is popular with professional audio/video applications - in particular those on the Apple Macintosh operating system. The format has now been superseded by the .AIFF format. The .AIF audio format produces files much larger than other formats, so is not suited for transferring across the internet. The compressed equivalent of this format uses the .AIFC file extension. The actual format was based on the Amiga's IFF format, and was co-developed by Apple.

Features:

  • AIFF: 1..32-bits PCM, loop, key-range, mono / stereo, name.
  • AIFC: As AIFF plus IMA 4-bit ADPCM / G.721 ADPCM / G.723 ADPCM / G.726
  • ADPCM / DWVW ADPCM / GSM 06.10 / MACE3 / MACE6 / μ-law / A-law. 

 (.AKAI) - AKAI S-series floppies & image files: The AKAI S-900/950/1000/3000 all use floppy disk formats that can't be read by Windows. However, you can use special third party utilities to create 'floppy disk image'. 12-bits (S900/S950), 16-bits (S1000/S3000), mono, instrument, layers, loop, name, sample start & end offsets, low-pass filter.

(.AKP) - AKAI S5000/S6000 programs: 16-bits mono / stereo, articulation, instrument, and low-pass filter.

(.AL/.ALAW/.ALW) - Raw CCITT/ITU G.711 A-law (European telephony format) audio: 
There's no standard file extension for this type of data and there's no way to auto-detect the format, so you'll have to use a .ALAW or .ALW file extension to make the program recognize what it is!: Α-Law, mono, 8 kHz.

(.AMR) - Adaptive Multi-Rate compression algorithm: is a compressed audio file format used for storing audio data encoded with the patented Adaptive Multi-Rate audio codec. The format was originally introduced and popularized by the Ericsson Corporation, but can now be found on every modern mobile device.The AMR codec is based primarily on the Algebraic Code-Excited Linear Prediction algorithm (ACELP), developed by the VoiceAge Corporation. In October 1998, AMR was adopted by the 3GPP organization as the standard audio codec for the 3G mobile system specification, making Adaptive Multi-Rate encoding dominant in VoIP and mobile communications. With that decision, an increasing number of applications were being developed to natively work with and export AMR files, gradually setting the AMR file format as the standard for storing audio on mobile devices.However, AMR compression is only useful on human speech recordings, as the ACELP algorithm is designed specifically with that purpose in mind. Therefore, AMR-encoding more complex audio data, such as music for example, usually produces unacceptable results in terms of accuracy and sound quality. Modern smartphones provide alternative applications designed primarily for recording music, which produce better results. These applications don't use AMR at all and let you store your recordings in a more convenient format like WAV instead.Speaking of AMR files, there is a common misconception about the type of codecs AMR files use. There are indeed two variations of the AMR codec: AMR-NB (Narrow Band) and AMR-WB (Wide Band), but AMR files only use the AMR-NB codec. The AMR-NB codec provides encoding at low bitrates, while its Wide Band alternative is used mostly for transmitting high-quality voice over the mobile network and/or for storing speech recordings in AWB files.Although widely popular on mobile devices, the AMR file format is still uncommon for desktop environments. Fortunately, AMR files can easily be converted to more convenient desktop audio formats such as WAV or OGG, using free applications like the MIKSOFT Mobile Media Converter. Features: MIME 'AMR file storage format': 4.75, 5.15, 5.9, 6.7, 7.4, 7.95, 10.2, or 12.2.kbit/s compressed, mono, 8 kHz.

(.AMS) - Extreme Tracker modules: Features:  8/16-bits, mono, name, bank.

(.AMS/.AIS/.ASE) - Velvet Studio modules/instruments/samples: Features:  8 / 16-bits, mono, name, loop, instrument, collection.

(.AMZ) - Amazon MP3 Downloader Download: is a special file format developed by Amazon.com for use with their Amazon MP3 Downloader desktop application.AMZ files contain no actual audio data. Instead, they're used to activate the Amazon MP3 Downloader and initiate MP3 or M4A downloads of tracks bought from the Amazon music store.AMZ files are generated dynamically by the Amazon music store and enable an easier bulk download of albums or playlists purchased by the user. The information stored inside an AMZ file is only valid for a limited amount of time, meaning that after a certain amount of time passes, the AMZ file expires and Amazon MP3 Downloader can no longer use it in order to retrieve the requested MP3 or M4A files.A major downside to AMZ files is that they lack good cross platform support and Amazon is generally restricting Linux users from retrieving AMZ files.

(.AOB) - AOB extension Files: are known as DVD-Audio Audio Object files, however other file types may also use this extension.

(.APC) - Cryo APC Audio: is an uncommon audio file format invented by Cryo Interactive Entertainment and used extensively in games developed by the company. APC files can be either mono or stereo and provide support to different sample rates. A typical Cryo APC Audio file usually consists of a header followed by sound data compressed with the IMA ADPCM audio compression algorithm. There are no popular media players that support the APC file format natively. However, a free multi-platform software application like FFmpeg can be used to convert APC files to other, more traditional audio formats.

(.APE) - Monkey Audio losslessly compressed files: is a lossless compression audio format used for storage of audio data compressed with the Monkey's Audio algorithm originally developed in 2000 by Matthew T. Ashland. Similar to other lossless audio compression formats, APE files retain the sound quality of the original recording and can be used as a source for its exact reconstruction.At the same time, APE files are much smaller in size compared to the original source, due to the advanced compression techniques that the algorithm is based on. Tests even show that the Monkey's Audio algorithm achieves slightly better compression rates in comparison to other popular lossless compression formats like FLAC or WV. This format is well suited e.g. for compressing important archive data without loosing any quality. Features:  8 / 16 / 24-bits, lossless compression.

(.APF) - File Extension: Used by Sony Ericsson phones to store acoustics settings.

(.APEX) - AVM Sample Studio bank files: 8 / 16-bits, loop, name, lfos, envelopes, layers, instruments, drum kit, collection.

(.ARL) - Aureal 'Aspen' bank files: 8 / 16-bits, loop, name, lfos, envelopes, layers, instruments, drum-kit, collection.

(.ASF) - Active Streaming Format files: 16 / 24 bit mono / stereo, 8, 11, 16, 22, 32, 44.1, 48, 88, 96 kHz, compresses to 5-160 kbit/s, text meta data.

(.AU) - Sun/NeXT/DEC audio files: AU (Sun Audio) is an audio container format originally developed by Sun Microsystems and introduced to the broader audience with their Sun Operating System (SunOS). AU files were a common encounter on SPARC and NeXT computer workstations, as well as on some of the early websites. Today, the AU file format is standardly supported on Unix-based platforms and Java.Initially, AU files were really plain and simple, storing only a basic µ-law-encoded representation of the audio data inside them. However, later on, the AU specification was upgraded to support a wider array of audio data encodings, including various PCM, IEEE floating point and ADPCM representations of the data. A-law encoding support was also added.Nowadays, the AU file format is considered a bit outdated and therefore many modern digital audio players and desktop audio applications cannot properly recognize and play AU files, which is a major disadvantage. Fortunately, there are plenty of free applications available that allow users to easily convert AU files to more common file types like WAV for example.Sun Microsystems AU files should not be confused with Audacity AU files. Audacity is a popular free audio editing application that is also cross-platform. When you import audio data into your Audacity project, this data is automatically saved as AU files when you save your project. The AU files in this case represent Audacity Audio Blocks rather than a Sun Audio files, and are therefore in no way compatible with the applications capable of providing playback to standard AU files. 8 / 16 / 24 / 32-bit PCM, 32 / 64-bit floating point, μ-law, A-law, G.721 (4-bit) ADCPM, G.723 (3 or 5-bit) ADPCM, mono / stereo.

(.AVR) -.AVR extension Files: are known as Audio Visual Research files, however other file types may also use this extension.

(.AWB) - The .AWB file extension: belongs to an audio format known as 'Adaptive Multi-Rate Wideband’. This format is supported by many mobile phone manufactures and is the format used in creating Nokia True Tones.

(.BMW) – Buzz:  is the first ever "easy to use" free modular software based synthesizer. In contrast to .bmx files, .bmw-files do not store wave data in the file itself but rather link to the external sample data.

(.BN4) Yamaha DX-series SysEx dumps: Yamaha DX21 / DX27 / DX100 voice SysEx dumps.

(.BNK) Yamaha DX-series SysEx dumps Yamaha DX11 / TX81z / DX21 / DX27 / DX100 voice SysEx dumps.

(.BNK) - Ad Lib banks: FM-synthesis instruments.

(.BWF) - Broadcast wave files: This is essentially the same as a WAV format file, but with restrictions on what data formats are allowed, and with some extra information strings stored in them. Normally they also use the .WAV file extension rather than .BWF. Any application that can read BWF files also ought to be able to read PCM data format WAV files. 8 / 16 / 24 / 32-bit PCM / MPEG audio layer II, mono / stereo, name, comment etc.

(.C01) - Audio Interchange File Format: The .C01 files are a variant used by the Typhoon OS for the Yamaha TX16W.

(.CAF) - Core Audio Files, an audio type that may be created and loaded through the use of the Core Audio API from Apple. These files may contain text annotations, audio channel data, audio markers, and more, as specified by the Core Audio API.CAF files are much like an AIFF file, but are not limited to 4GB in size. Further, CAF files may contain any number of audio channels. Applications loading CAF files must use the Core Audio API and include Quicktime Player 7 or higher.

(.CDA) - Audio CD tracks: These files are virtual 'placeholders' that Windows shows in place for audio tracks on an audio CD. You can digitally read the audio track (a.k.a. 'ripping') by simply opening the .CDA file. 16-bits, stereo. .CDA files are shortcuts that references an individual track on an audio CD. These .CDA files do not contain any audio data, they simply provide a means to access individual tracks on a CD via an icon. As these files do not contain any audio information, they cannot be converted to another audio format. As the shortcut generally references a particular track, for example a favorite song, the original CD should be in the drive before clicking the shortcut. 

(.CFA) - Conformed Audio files: are created with some of the applications included in the Adobe Creative Suite version 4 or later. Developed by Adobe Systems Inc., the suite is designed for video and audio editing, graphic design and web development. The applications that create CFA files are Adobe Premiere Pro, After Effects, Encore and Soundbooth. They are created by default each time an audio file is imported to a new project.As the name of the format suggests, CFA files are conformed to a proprietary format owned by Adobe. They are also used for improving the performance of the applications above when working with audio data and when creating previews for waveform files. The new format is easier to access and to parse resulting in shorter processing times. Still, because of initial caching, users may encounter a short delay when importing audio data for the first time.Since CFA files contain uncompressed audio data, they can become very large. This can be avoided by disabling caching. However, this will result in longer processing times for audio previews. CFA files are automatically created by the Adobe Media Encoder, a standalone component of the Adobe Creative Suite that comes with all the applications mentioned above. All programs that use CFA files reference the same cache.

(.CDR) - Audio CD compatible raw data: This is raw CD-format audio, i.e. it does not refer to reading data from an actual audio CD. 16-bits, stereo.

(.CMF - Creative Labs FM music files): FM-synthesis instruments, song.

(.COD) - 3GPP 'AMR interface format 2': 4.75, 5.15, 5.9, 6.7, 7.4, 7.95, 10.2, or 12.2.kbit/s compressed, mono, 8 kHz.

(.CPR) - Cubase Project: is a special file format developed by Steinberg Media Technologies and originally introduced in 2002 with the release of Cubase SX 1.0.Cubase Project Files contain no actual audio data. Instead, they contain metadata necessary for properly rendering a project inside Cubase.This metadata includes (but is not limited to) references to all audio files associated with the given project, information about the total number and type of tracks used in the project, and any automation settings or effects that may have been applied to those tracks, mixer settings, VST settings, and many other global preference settings.CPR files may also be used for the creation of so-called templates - empty Cubase projects that act as preset environments for specific purposes, such as multi-track recording, surround mixing, stereo mastering etc.Since CPR files contain no actual audio data, it is important to know that in order to open a CPR file properly on another machine, all external audio and VST files should also be transferred to that machine. In addition, in order to convert CPR files to MP3 for playback on other devices, you need to open up the file in Cubase and use the File > Export > Audio Mixdown menu.

(.CWP) -.CWP extension: are known as Cakewalk SONAR Project files, however other file types may also use this extension.

(.DAC) - DAC Sound file: stored in TI/MIT DAC format (byte reversed ADC file). 

(DCF) - DRM Content Format: is a special media container format used for storing data encoded with a proprietary Digital Rights Management (DRM) technology for copy-protection.DCF files are mostly used on cell phones (most notably on cell phones manufactured by Nokia, Motorola and Sony Ericsson) for distributing paid ringtones, videos or wallpapers.Content stored in DCF files is locked and becomes accessible only after undergoing DRM activation. During DRM activation, the cell phone connects to a remote DRM server, which authenticates with the phone, checks the rights object and if everything is valid - unlocks the content that is stored in the file. Since DCF files are most commonly used for ringtones, they are often categorized as audio files, while they can actually contain a wide array of media types.

(.DCM) - DCM modules: .DCM files are music module files that are DCM encoded. 8 / 16-bits, mono, loop, collection.

(.DCT) - .DCT extension are known as Dictation Audio files.

(.DEWF) - SoundCap / SoundEdit instruments: 8-bit, mono, loop.

(.DIG) - Digilink format: 16-bits, stereo.

(.DIG) - Sound Designer I files: Files with the DIG extension are associated with Sound Designer. The program was developed in 1985 by Digidesign to serve as recording and editing software for Macintosh Systems. The DIG file format was the main format used by the Sound Designer Application. DIG files are monophonic and of low sampling size and bitrate. Because of the low quality sound, the DIG format is not used anymore. 8, 16-bits, mono, name, loop.

(.DLS) - Downloadable Sounds level 1 & 2 / Mobile DLS:

  • Level 1 & up: 8 / 16-bit PCM, mono, loop, envelopes, lfo, collection, drum-kits, instruments.
  • Level 2 & up: layers, per region articulation, two lfo's, low-pass filter.
  • Level 2+ & up:μ-Law / Α-Law / 24 / 32-bit PCM / 32-bit floating point / DVI-IMA 4-bit ADPCM / MPEG layer III compression.
  • Level 2++ & up:stereo, fractional loop points, reverse & bidirectional loops, layer level articulation, LFO ramp time, LFO shapes, filter type, etc. 

(.DMF) - Delusion/XTracker digital music format: 8 / 16-bits, mono, loop, name, instruments, collection.

(.DSF) - Delusion/XTracker sample format: 8 / 16-bits, mono, loop, name, instruments, collection.

(.DR8) - FXpansion DR-008 drumkits: 32-bit floats, mono/stereo, name, low-pass filter.

(.DSM) - Digital Sound Module format: 8-bits, mono, name, loop, collection.

(.DSS) - Digital Speech Standard: is a high-compression digital audio file format developed in 1994 by Grundig Business Systems at the University of Nuremberg, but officially released and specified in 1997 by the International Voice Association - a cooperative venture formed by Grundig Business Systems, Philips Electronics and the Olympus Corporation.DSS files are designed specifically for compressing human speech and are used extensively in most digital voice recorders and dictation devices produced by the above-mentioned companies.The major advantage of DSS files is their reduced file size. Compared to a WAV file of the same length for example, a DSS file would be only about 12% in size.DSS is a proprietary format, meaning its specification is closed to third-party developers outside of the ones involved in the International Voice Association.DSS files may contain metadata specifying how long the recording is or exactly when the recording was made. While DSS files can be easily played on PC or MAC with the freely-distributed Olympus DSS Player Lite, there are a number of free conversion tools available that allow converting DSS files to more common audio formats like MP3 or WAV.One of the most popular free tools for that purpose is probably the Switch Sound File Converter Plus available on CNET.You must have the Olympus DSS Player software installed to be able to read these files (DSS Player 3.x, 2000, or Pro versions supported). 16-bits, mono, Meta info.

(.DTM) - DigiTrekker modules: 8 / 16-bits, mono, loop, name, collection.

(.DTS) .DTS contains 'digital surround audio data' or 'soundtrack'. DVD movies often use .DTS files to store multi channel sound data; this is used to best advantage with audio settings of 5.1 channels. This essentially recreates the 'surround sound' format popular in cinemas and theatres. Most DVDs come with a selection of audio formats (files)to increase the choices available to the user, and to fit in with technological restraints, i.e. not all televisions / DVD players support the DTS format, so .DTS soundtracks are user selectable rather than standard. Some Audio files (Cd's, etc.) also utilise the DTS format to enhance listening pleasure.

(.DTSHD) is a file extension corresponding to a DTS HD lossy or lossless audio stream. The DTSHD audio format is generally used with a corresponding video stream in order to author Blu-Ray and High Definition (HD) DVDs. Further, a DTSHD lossy audio stream may be restored to its original lossless stream using the DTSHD Master Suite application for manipulating this format from DTS, Inc.

(.DVF) - Files with the extension .DVF are audio files recorded using certain models of Sony dictation / voice recorders. DVF files may require the use of the Sony plug-in 'Sony ICD 1.2 Download' in order to play on PC.

(.DWD) - DiamondWare digitized files: 8 / 16-bits, mono / stereo.

(.DX7) - Yamaha DX7 voice SysEx dumps / Raw Yamaha DX7 32-voice data.

(.EDA) - Ensoniq ASR disk images. 16-bits, mono, loop, names, fine-tune, layers, instruments, collection, sample start offsets.

(.EDE) - Ensoniq EPS disk images. 16-bits, mono, loop, names, fine-tune, layers, instruments, collection, sample start offsets.

(.EDK) - Ensoniq KT disk images. 16-bits, mono, loop, names, fine-tune, layers, instruments, collection, sample start offsets.

(.EDQ) - Ensoniq SQ1/SQ2/KS32 disk images. 16-bits, mono, loop, names, fine-tune, layers, instruments, collection, sample start offsets.

(.EDV) - Ensoniq VFX-SD disk images: 16-bits, mono, loop, names, fine-tune, layers, instruments, collection, sample start offsets.

(.EFA) - Ensoniq ASR instrument files: 16-bits, mono, loop, names, fine-tune, layers, instruments, collection, sample start offsets.

(.EFE) - Ensoniq EPS instrument files: 16-bits, mono, loop, names, fine-tune, layers, instruments, collection, sample start offsets.

(.EFK) - Ensoniq KT instrument files: 16-bits, mono, loop, names, fine-tune, layers, instruments, collection, sample start offsets.

(.EFQ) - Ensoniq SQ1/SQ2/KS32 instrument files: 16-bits, mono, loop, names, fine-tune, layers, instruments, collection, sample start offsets.

(.EFS) - Ensoniq SQ80 instrument files: 16-bits, mono, loop, names, fine-tune, layers, instruments, collection, sample start offsets.

(.EFV) - Ensoniq VFX-SD instrument files: 16-bits, mono, loop, names, fine-tune, layers, instruments, collection, sample start offsets.

(.EMB) - Everest embedded bank files: Compression, loop, name, lfos, envelopes, layers, instruments, drum-kit, and collection.

(.EMD) - ABT extended modules: 16-bits, mono, loop, name, collection.

(.EMX) - eMusic Download Manager Download file format: Files represent downloads associated with the eMusic Download Manager and are commonly referred to as eMusic Download Manager Downloads. The eMusic Download Manager is a desktop application developed especially for the needs of the eMusic.com online store and allows downloading music tracks or audio books in MP3 format on a client machine.eMusic users pay a monthly subscription fee and are allowed to download a fixed number of tracks every month. The store is preferred mostly by people interested in downloading entire albums. EMX files contain all the necessary metadata needed to point the eMusic Download Manager to the exact location of the MP3 files associated with the album queued for download.They contain no actual audio data on their own, but only a reference to where the audio data can be located.

(.ENC) - Encore Musical Notation: are files that have been encoded in the .UUE encoding format and then saved with the generic ".enc" file extension. ENC files are often encoded with the use of a specific encoding program. Examples of programs that produce encoded .ENC files are IBM Lotus 1-2-3 or Adobe Flash. The UUE encoding and generic naming convention is helpful in protecting the file from being opened or viewed plainly by unauthorized users.

(.ESPS) - ESPS audio files: 8 / 16 / 32-bit integer / 32 / 64-bit floating point, mono.

(.EXS) - Logic EXS24 instruments: 8/16/24/32-bits, names, loops, layers, instrument, and trigger type.

(.EUI) - Ensoniq EPS family compacted disk images: 16-bits, mono, loop, names, fine-tune, layers, instruments, collection, sample start offsets.

(.FAR/.FSM/.F2R/.F3R) - Farandoyle tracker formats: 8 / 16-bits, mono, loop, name, collection.

(.F32/.F64) - Floating point raw 32/64-bit IEEE data: 32 / 64-bits floats, mono.

(.FFF + .DAT) - Gravis UltraSound PnP bank files: The .FFF file contains all 'instrument parameters' and stuff while the accompanying .DAT file contains the actual sample data, which is to be downloaded to the synth's memory. 8 / 16 bit / μ-law, mono, loop, lfo, amplitude envelope, layers, instruments, drum kits, collection.

(.FLAC) - Free lossless audio codec files: Files with the FLAC (Free Lossless Audio Codec) extension are created using a compression algorithm developed by the Xiph.org non-profit organization. FLAC is the most widespread lossless audio codec and the only one that comes with open source reference implementation and it's both non-proprietary and unpatented.The FLAC File Format enables efficient audio compression without any loss of sound quality. FLAC files are 50 - 60% smaller than the original audio files used for compression. The process can also be reverted resulting in an identical copy of the uncompressed audio file. FLAC files offer support for album cover art, metadata tagging and for fast seeking.This format is well suited e.g. for compressing important archive data without loosing any quality, 8/16/24 bits, lossless compression, mono / stereo, meta info.

(.FLP) – Fruity Loops Project Files: is the propriety audio file format used by 'Fruity Loops Studio' which is often known simply as 'Fruity Loops'. Fruity loops is described as being a 'digital audio workstation', essentially a music creation tool based around a pattern-based sequencer and featuring editing/mixing/recording utilities and includes MIDI support..FLP files can be converted to .MP3 or .WAV format within Fruity Loops.* .FLP files may not work properly when attempting to load within a version of Fruity Loops different to the version in which they were created.

(.FNK) - FunkTracker modules: 8-bit PCM, mono, loop, name, panning, collection.

(.FOR) - Kurzweil Forte files: 16-bits, mono, loop, names, layers, instruments, collection, MIDI song, trigger type.

(.FSB) - FMOD SoundSystem sound banks: 8...32-bits, mono/stereo, loop, name.  

(.FST) – Studio State File: Files with the extension .FST are studio state files created and used by 'Fruity Loops Studio'. .FST files are used to store current channel presets such as generator and effects presets.

 (.FZB/.FZF/.FZV) - Casio FZ-1 formats: 16-bits, mono, loop, name, instruments, sample start & end offsets.

(.G721) - G.721 4-bit (32 kbps) ADPCM format data: ADPCM 4-bit lossy compression, mono.

(.G723) - G.723 3/5-bit ADPCM format data: ADPCM 3 / 5-bit lossy compression, mono.

(.G723-3) - G.723 3-bit (24 kbps) ADPCM format data: ADPCM 3-bit lossy compression, mono.

(.G723-5) - G.723 5-bit ADPCM format data: ADPCM 5-bit lossy compression, mono.

(.G726) - G.726 2/3/4/5-bit ADPCM format data: ADPCM 2 / 3 / 4 / 5-bit lossy compression, mono.

(.G726-2) - G.726 2-bit (16 kbps) ADPCM format data: ADPCM 2-bit lossy compression, mono.

(.G726-3) - G.726 3-bit (24 kbps) ADPCM format data: ADPCM 3-bit lossy compression, mono.

(.G726-4) - G.726 4-bit (32 kbps) ADPCM format data: ADPCM 4-bit lossy compression, mono.

(.G726-5) - G.726 5-bit (40 kbps) ADPCM format data: ADPCM 5-bit lossy compression, mono.

(.GDM) - Bells, Whistles, Sound Boards modules: 8-bit, mono, loop, name, collection.

(.GIG/.GI) – GigaStudio / GigaSampler files: 8 / 16 / 24-bits, mono, loop, envelopes, lfo's, collection, instruments, layers, lossless PCM compression (of 16 / 24-bits PCM formats), sample start offsets, multiple filter types.

(.GKH) – Ensoniq EPS family disk image files: 16-bits, mono, loop, names, fine-tune, layers, instruments, collection, sample start offsets.

(.GPX) - Guitar Pro 6 Document file format: GPX (Guitar Pro 6 Document) is a special container file format developed by Arobas Music for storing musical scores and guitar or bass tablatures created with their multitrack editor Guitar Pro.The Guitar Pro 6 GPX file is strictly a file containing musical notation. Contrary to older Guitar Pro formats, such as GP3, GP4 and GP5, data stored in GPX files is encoded using a proprietary made dynamic dictionary compression scheme.The data itself, once uncompressed, represents a “little hard-disk” (an independent file system) consisting of various XML files that contain the actual data used for rendering the file inside the Guitar Pro editor, such as information about the various bars, tracks, voices, beats and notes that form the actual file.On its own a GPX file contains no real audio data, but only metadata used for generating audio with the Guitar Pro editor.A major downside of GPX files is that they cannot be natively exported to one of the older Guitar Pro formats, making it impossible to open Guitar Pro 6 documents, without buying the latest copy of Guitar Pro.GPX files can still be exported to MIDI and thus imported to an older version of the editor, however that usually renders inaccurate tablatures, making it a less-than-ideal solution.

(.GSM) - GSM 06.10 audio streams: There are at least two possible types of 'packings'. One with packets of 32.5 Bytes/frame and one with 33 Bytes/frame (where the first 4 bits in a packet is ignored). Which packing style is used is auto detected. GSM compression, mono, 8000 Hz.

(.GSM) - US Robotics voice modems GSM files: There are two types of these files. One has a file header and is used by e.g. the QuickLink software. The other has no header and is used by e.g. the VoiceGuide and RapidComm software. Which type a file is can usually be detected, but when saving files to be used by some voice modem software, you may have to try both and see which one works with that program. GSM compression, mono.

(.HCOM) - Sound Tools HCOM format: Huffman compression, mono.

(.IBK) - Creative Labs FM banks: FM-synthesis instruments, song.

(.IFF) - Interchange file format 8SVX and 16SV data types: Container file format developed by Electronic Arts and Commodore back in 1985. As this format is simply a wrapper, the actual data inside can be anything from audio (most common) to images and video.The actual format itself is made up of sections called 'chunks', which are defined by four-letter IDs. The three types of chunks are: 

  • FORM - defines the format of the file
  • LIST - includes the properties of the file
  • CAT - includes the remaining data

 The 16SV flavor is rather uncommon and is perhaps only used by some PC trackers. Thus if you save .IFF files with '16-bit PCM' data format, then do not expect them to be readable by most .IFF readers. 8 / 16-bits, loop, name, mono / stereo.

(.IMW) - IncrediMail MIDI/WAV: contains a collection of data used by IncrediMail, an email client that produces multimedia e-mail.

(.IMY) - iMelody mobile ringtone format: Files with the extension .IMY are ringtone files supported by various mobile phone manufacturers including: Sony Ericsson, Motorola, Siemens and Alcatel.The .IMY (iMelody) format is a non-polyphonic or monophonic ringtone that supports volume modification and has the ability to control the phones backlight, any LED lights and vibrations.The .IMY file format is based on Sony Ericsson's proprietary 'eMelody' format..IMY ringtone files can be transferred to a mobile phone via text message, text-file, bluetooth, data cable, MMS or by e-mail. The iMelody format is not the same as the i-Melody format used by the Japanese i-Mode phones.

(.INI) - Gravis UltraSnd.ini bank setup: Same as for .PAT + collection + drumkits.

(.INI) - IBM MWave DSP synthesizer bank setup (MWSYNTH.INI): 8 / 16-bits, loop, name, instruments, layers, collection.

(.INRS) - INRS-Telecommunications audio files: 16-bits mono.

(.INS) - Ensoniq instrument files: 16-bits, mono, loop, names, fine-tune, layers, instruments, collection, sample start offsets, trigger type, pedal switch.

(.INS) - Ad Lib instruments: FM-synthesis instruments.

(.INS) - Sample Cell II PC/Mac instruments: There are two different (incompatible but very similar) varieties of these files, a PC format and a Mac format. These files contains one instrument definition (per file) and references a bunch of external waveform files. For the PC format, the external files is .WAV files. For the Mac format (usually .INS) they can be either .AIF(F) or .SD2(F) files. When reading an .INS file you should put all these external files into the same directory as the .INS file. It is very important that these external files retain the original filename that they were written - so when transferring Mac files to a PC, take extra care to retain the 'long' file names. Moreover, in case of referenced .SD2 files you must transfer it to a 'flattened' MacBinary format file. 8 / 16-bits mono, instrument, sample start offsets.

(.INS) - Cakewalk instrument definition files: Names and midi program assignments for instruments.

(.IST) - Digitrakker instrument files: 8, 16-bits, mono, loop, name, huffman packing, collection.

(.IT) - Impulse Tracker modules: 8 / 16-bits, mono / stereo, loop, name, instrument, collection.

(.ITI) - Impulse Tracker instrument: 8 / 16-bits, mono / stereo, loop, name, instrument, collection.

(.ITS) - Impulse Tracker sample: 8 / 16-bits, mono / stereo, loop, name, instrument, collection.

(.IVC) - InterVoice sound file format: Files with the IVC extension are associated with the Intervoice Audio format developed for recording human speech. IVC files are based on the Adaptive Differential Pulse Code Modulation technology, which lowers bandwidth requirements for any signal-to-noise ratio.The IVC file format is mostly used for computer telephony software. It is also used for compressing voice recordings that were originally created using a lossless file format. IVC files support a maximum 8-bit sampling rate and monophonic only audio data. However, they can be compressed using various schemes. Features: G.711 µ-Law and A-Law, G.721 ADPCM (32 kb/s) and G.723 ADPCM (24 kb/s) data formats. 

(.K25) - Kurzweil K2500 files + CD-ROM's: 16-bits, mono, loop, names, layers, instruments, collection, MIDI song, multiple filter types, trigger type.

(.K26) - Kurzweil K2600 files + CD-ROM's: 16-bits, mono, loop, names, layers, instruments, collection, MIDI song, multiple filter types, trigger type.

(.KAR) -  Karaoke MIDI File:KAR files are MIDI files that contain song lyrics. KAR files contain a combination of both MIDI data as well as the text that is used for karaoke. Within the KAR file, the lyrics are synchronized to display in time with the music. Traditional MIDI files contain music and no lyrics. However, since the KAR Karaoke files are similar to standard MIDI files, they do not contain actual audio data.

(.KFN) - Audio File: Files with the extension .KFN are audio files associated with 'Karafun' which is a karaoke system for the PC.KFN files are audio files downloaded for the karaoke system via the Karafun website.

(.KAWAI12) - KAWAI R50/R50E/R50III/R100 ROM-dump: 12-bit nonlinear audio (DAT LP), mono.

(.KDT) - Konami KDT1 songs: MIDI song data.

(.KFT) - Korg T-series waves: 16-bits mono.

(.KIT) - Native Instruments Battery v1 drum-kit files: 16-bits mono/stereo, loop, envelopes, names, instruments, collection.

(.KMP) - Korg Kronos / M3 / M50 / Triton / Triton LE / Trinity keymap file: A .KMP file contains a 'multisample' for the Korg Kronos, M3, M50, Triton, Triton LE or Trinity - corresponding to a 'layer' in this program. It references one or more KSF files containing individual waveforms.Note that each synth can load KMP files made for its predecessor(s), but there are some minor differences between the files made for the respective synths. 8 / 16-bits, mono, loop, names.

(.KOE) - AquesTone Vocal Synthesiser Syllable File: Syllable file used by the synthesizer software 'AquesTone Vocal Synthesiser'.These .KOE files store syllables that the synthesizer then 'sings' based on user-assigned keys. AquesTone Vocal Synthesiser can also output singing voices by reading MIDI data and text lyrics.

(.KR1) - Kurzweil K2000/K2500/K2600 split file: 16-bits, mono, loop, names, layers, instruments, collection, MIDI song, multiple filter types, trigger type.

(.KRz) - Kurzweil K2000 file (also K2500 & K2600): 16-bits, mono, loop, names, layers, instruments, collection, MIDI song, multiple filter types, trigger type.

(.KSC) - Korg Kronos / M3 / M50 / Triton / Triton LE / Trinity script file: A .KSC files contains a list of KMP files (multisamples) - normally to be used by your own programs - and/or KSF files (samples) - normally to be used as drums (but note that these contain no key assignments so they will not show up as a drum-kit). This list is used to load them all in one batch into the synt. When saving an instruments or a collection to a KSC file, then melodic instruments are written as KMP files, and drum kit's as KSF files - all listed in the KSC file.KMP and KSF files are stored in a sub-directory with the same name as the .KSC file.Note that each synth can load KSC files made for its predecessor(s), but there are some minor differences between the files made for the respective synths.The Kronos use a v2 of the KSC format, which probably will not work with the older synths.It includes a "uuid" - a unique number identifying the collection of files. 8 / 16-bits, mono, loop, names, instruments, collection.

(.KSF) - Korg Kronos / M3 / M50 / Triton / Triton LE / Trinity sample file: KSF files contains waveforms (samples) for the Korg Kronos / M3 / M50 / Triton / Triton LE / Trinity. 8 / 16-bits, mono, loop.

(.LQT) - Liquid Audio Music File: LQT files are audio/music files created for use in the audio play-back application 'LiquidAudio'.These audio files are DRM (digital rights management) protected.

(.LVP) - Avaya Voice Player - Compressed Voice Audio File: Avaya’s Voice Player - a software application for recording and playback of voice audio, uses The .LVP format. Avaya's Voice Player can be used as an Internet Browser Helper Application or can be integrated with your e-mail software to turn it into a voice mail system. Audio files with the .LVP extension are compressed, meaning file sizes are smaller and easier to send over the internet.

(.M3U) - Media Playlist File: Playlist file saved in a plain text format containing the names (and sometimes the physical location) of one or more media files. generally MP3 music files.A compatible media player will then play through the media files in the specified order found in the .M3U playlist file.The .M3U file only contains text and does not contain any media data.The format was originally developed for WinAmp but is now supported by many other media players.These files contain a single header line (#EXTM3U) followed by an entry for each media file.

(.M4A) - iTunes MPEG-4 audio format: .M4A: MPEG-4 AAC / Apple Lossless (ALAC, read-only), mono / stereo, text info.

(.M4R) - IPhone ring-tone: .M4R: MPEG-4 AAC / Apple Lossless (ALAC, read-only), mono / stereo, text info.

(.MAP) - Native Instruments Reaktor wavetable files: (8 / 16 / 32-bit PCM) / 32-bit float, mono / stereo, instrument (single layer).

(.MAT) - Matlab variables binary files: 8 / 16-bits / floats, mono / stereo, collection.

(.MAUD) - MAUD sample format: 8 / 16-bits / μ-Law / A-Law, mono / stereo, name.

(.MDL) - Digitrakker module files: 8, 16-bits, mono, loop, name, huffman packing, collection.

(.MED) - OctaMED modules: 8-bits, loop, name, collection.

(.MID) - Standard MIDI files: This program supports two types of standard MIDI files 'format 0' and 'format 1'. Which one will be used when you save depends on what format the source data is:

  • Format 0 has all data for all channels stored in a single track. This is the most portable format.
  • Format 1 has the data for each channel separated into it's own track. There is also an extra track (the first one) that contains 'control information' (e.g. tempo changes). This is the format most often used by sequencers and is the format that we recommend.
  • Format 2 is used to store temporally disjoint 'sequences' in different tracks. This format is seldom used and may not be correctly handles by this program.

(.MID) - Roland D-50 patch SysEx dumps: LA-synthesis instruments.

(.MID)- Roland MT-32 (and compatibles) timbre SysEx dumps: LA-synthesis instruments, 16-bit PCM, loop.

(.MID) - Yamaha DX7 voice SysEx dump: FM-synthesis instruments.

(.MID) - Yamaha DX7s / DX7II / DX200 voice SysEx dump: FM-synthesis instruments.

(.MID) - Yamaha DX11 / TX81z voice SysEx dump: FM-synthesis instruments.

(.MKA) - Matroska audio file: MKA (Matroska Audio) is an audio container format and as such can contain an unlimited number of audio streams stored inside it, encoded with virtually any existing audio codec, like MP3 or Vorbis to name a few.The Matroska format is being developed with the intention to become the ultimate standard in multimedia container formats and is currently well supported on all major platforms.One of the major advantages of the MKA file format is that it supports chapter markers and subtitle tracks, allowing you to store an entire music album, separated track by track, into a single file, along with all its lyrics.Matroska is also free of charge to use and requires no commercial license, making it an excellent choice for developers.8/16/24/32-bits PCM / 32/64-bits float / MPEG audio layer I / II / III / MPEG AAC / Vorbis Ogg / AC3 / DTS, mono / stereo / multi-channel, text Metadata.

(.MKV) - Matroska video file: 8/16/24/32-bits PCM / 32/64-bits float / MPEG audio layer I / II / III / MPEG AAC / Vorbis Ogg / AC3 / DTS, mono / stereo / multi-channel, text Meta data.

(.MLD) - MFi/MFi2 songs a.k.a. i-Melody: Song, ADPCM 4-bit compressed recordings (v2+ only).

(.MLS) - Miles Sound System compressed DLS file: MLS files are basically 'DLS level 1' files with the addition of optional DVI/IMA 4:1 ADPCM compression of the waveform data. 8 / 16-bits PCM / 4-bit ADPCM, mono, loop, envelopes, lfo's, collection, drumkits, instruments, layers, MIDI song.

(.MMF) - Mobile Music File: is the default file extension for files belonging to the SMAF specification. SMAF stands for Synthetic-music Mobile Application Format.The SMAF format was developed by Yamaha and introduced with the production of their MA-1, MA-2, MA-3, MA-5 and MA-7 LSI sound chips (respectively capable of 4-, 16-, 40-, 64- and 128-polyphony), which all found broad use in mobile phones placed on the East Asian market around the early 2000s.Internationally, the MMF format was most endorsed by Samsung, being used as the default polyphonic ringtone format on a wide range of their mobile devices. With the increasing popularity of modern smartphones, the MMF format became less relevant to the mobile industry. However, certain lower end phones not capable of WAV or MP3 playback etc., are still and may continue using the MMF format to store their ringtones.In structure, MMF/SMAF files highly resemble a MIDI file. However, what makes them different from MIDI, is that MMF files may also encapsulate descriptive metadata (such as artist, song title, genre), graphics and/or raw PCM audio data. PCM audio data may be there, because except through FM synthesis (like in MIDI files), playback may be also produced via PCM wavetable synthesis (similar to module files like MOD, XM, IT or S3M to name a few), in which case there are PCM audio tracks that serve as a sound source and define the timbre of the instruments. The PCM method allowed the ringtones to sound the same regardless of the sound chip that provides their playback.To popularize the format, Yamaha published a number of tools at the official Yamaha SMAF website, which allowed users to easily play MMF files on their desktop computers and convert them from and to widely popular formats like WAV and MID. It's interesting that compared to MIDI, regular MMF/SMAF files (using only FM synthesis to produce feedback) are only two-thirds of the size, which still makes them a good choice for sharing and distributing this type of audio content.In addition to song data, these files can contain instruments parameters of three types: FM (using FM-synth), PCM (using wavetable synth) and Stream PCM (longer audio clips). Song of type '0' (used by MA-1 and MA-2 chip-sets) and of type '2' (used by MA-3 and MA-5 chip sets), ADPCM compressed 'streams', PCM instruments, FM-synthesis instruments.

(.MON) - Wavelab Audio Montage File: Used by the digital audio editor, Wavelab to store audio montages.

(.MOD) - Module files: 8-bits, mono, loop, name, fine-tune, collection, MIDI song.

(.MOV) - Apple QuickTime movie format: .MOV:  8 / 16 / 24 / 32 bit PCM / 32 / 64 bit floats / μ-law / A-law / Apple MACE3 / MACE6 / IMA 4-bit ADPCM / MS 4-bit ADPCM / MPEG audio layer III / GSM 06.10 / MPEG-4 AAC / AMR / Apple Lossless (ALAC) / AC3 / DTS, mono / stereo / multi-channel, text info.

(.MP1) MPEG audio stream, layer I: 16 bit mono / stereo, 48, 44.1, 32, 24, 22.05, 16, 12, 11.025, 8 kHz, compresses from 8 to 448 kbit/s.

(.MP2) MPEG audio stream, layer II: 16-bit mono / stereo, 48, 44.1, 32, 24, 22.05, 16, 12, 11.025, 8 kHz, compresses from 8 to 448 kbit/s.

(.MP3) MPEG audio stream, layer III: 16-bit mono / stereo, 48, 44.1, 32, 24, 22.05, 16, 12, 11.025, 8 kHz, compresses from 8 to 448 kbit/s.

(.MP4) - MPEG-4 base media file format: .MP4: AMR / MPEG-4 AAC, mono / stereo.

(.MPA) MPEG audio stream, layer I, II, 'II½' or III:16 bit mono / stereo, 48, 44.1, 32, 24, 22.05, 16, 12, 11.025, 8 kHz, compresses from 8 to 448 kbit/s.

(.MPC) - Musepack audio compression: Background: Musepack is an open source lossy audio compression. It is optimized for "transparent" audio coding at ~180 kbit/s and higher. Is is loosely based on MPEG audio layer II but adds several improvements, while avoiding some of the compression artifacts that is present with MPEG layer III (.MP3) even at high bit-rates. 32-bit floating-point data, mono / stereo, 32 / 37.8 / 44.1 / 48 kHz, bit-rates from ~20-350 kbit/s, Meta info tags.The file extension .MPC is associated with "MusePack" an audio compression format based on the MPEG-1 layer-2/MP2 algorithms.Devices that support playback of MPC files include: Pocket PC, Palm OS, Symbian OS, Windows CE and Windows mobile.

(.MPEG/.MPG) - MPEG system streams: Handles both MPEG 1 system streams, and MPEG 2 'program' system streams.

(.MSS) - Miles Sound System formats: MSS files combines an 'Extended MIDI' or .XMI song with either a .DLS or an .MLS into a single file.

(.MSV) - Sony Memory Stick Compressed Voice File: Compressed audio file which contains voice recordings, requires a Sony plug-in for play-back in Windows Media Player.

(.MT2) - MadTracker 2 modules: 8 / 16-bits, mono / stereo, loop, name, collection (for modules), multiple filter types.

(.MTI) - MadTracker 2 instruments: 8 / 16-bits, mono / stereo, loop, name, collection (for modules), multiple filter types.

(.MTM) - MultiTracker modules: 8 / 16-bits, mono, loop, name, collection.

(.MUS) - Doom/Heretic music files: MIDI song.

(.MUS10) - Mus10 audio files: 12 / 16 / 18 / 20 bits, mono / stereo.

(.MWS) - IBM MWave DSP synthesizer's instrument extracts: The software synthesizer module for the IBM MWave DSP uses the MWSYNTH.INI file to construct instruments from usual .WAV files. When exporting to the MWS format, it outputs a bunch of .WAV files as well as a .MWS text file containing an instrument extract that can be manually pasted into the MWSYNTH.INI file. 8 / 16-bits, loop, name, layers, instruments. 

(.NCOR) - Adobe Encore Project File: An NCOR file is a project file used by the Adobe Encore program that is used to describe all resources and information needed to author a DVD, Blu-Ray, or web media files. The NCOR file will describe the location and usage of all video files contained in the project as well as any image files, audio files, or menus. In addition, it will also contain the chapters and time lines for web authoring, Blu-Rays, or DVDs.

(.NIST) - NIST SPHERE files: These files do not seam to use any definite file extensions, though .NIST, .SD, or .WAV is often seen. 8, 16, 24, 32-bits PCM / μ-Law, mono / stereo / multi.

(.NKI) - Native Instruments Kontakt Instruments:  16..32-bits, loop, name, lfos, envelopes, layers, instruments, collection, sample start & end offsets, filters, scripts.

(.NKM) - Native Instruments Kontakt Multi:  16..32-bits, loop, name, lfos, envelopes, layers, instruments, collection, sample start & end offsets, filters, scripts.

(.NKB) - Native Instruments Kontakt Bank:  16..32-bits, loop, name, lfos, envelopes, layers, instruments, collection, sample start & end offsets, filters, scripts.

(.NKP) - Native Instruments Kontakt Preset:  Presets.

(.NKR) - Native Instruments Kontakt Resource File:  graphics, scripts, and IR samples.

(.NCW) - Native Instruments Kontakt lossless compressed audio file: Samples.

(.NKX) - Native Instruments Kontakt protected monolith: Samples + Patches + Presets.

(.NKC) - Native Instruments Kontakt Cache File: has a list on which position each file within a monolith starts.

(.NRT) - Nokia Ring Tone: is a heavily outdated audio file format developed by the Nokia Corporation and primarily used for storing and playing monophonic ringtones on their early 2000s mobile phones. In their essence, NRT files are not much different from regular MIDI files, except that the size of an NRT file is not supposed to exceed 10-15 kilobytes in order to be properly played by the phone. Older versions of the Nokia PC Suite were able to convert NRT files to more convenient audio file formats; however, newer versions are no longer capable of performing this conversion, making it really hard to conveniently convert NRT files to more popular formats like MIDI, WAV or MP3.

(.NVF) - Creative Labs Nomad voice files: ADPCM 4-bit lossy compression, mono.

(.NWC) - Noteworthy Composer Song File: Song data file used by the music composition and notation processor tool, 'Noteworthy Composer'.

(.O01) - Typhoon voice files: The actual waveform data are stored in accompanying .C01 file(s). DWVW compression, mono, loop, instrument.

(.OGA) - Ogg Vorbis Audio: An audio container file for an audio file compressed using the Ogg Vorbis audio compression method. These files may also be given the OGG file extension.The Ogg Vorbis audio compression was created to compete with MP3, AAC, and other popular audio formats as a highly compressed but high quality audio codec. Audio recorded in OGA or OGG formats often sound better than MP3s of the same size.

(.OGG) - Vorbis Ogg streams: The Vorbis format uses variable bit-rate encoding and the bit-rate that you select when writing is the approximate average bit-rate only. Also note that not all bit-rates are available for all types of input data, e.g. the 8-kbit/s mode is only available for 8000 Hz mono data as input, other input formats will be saved used the nearest supported bit-rate. Mono / stereo, compresses to ~32-500 kbit/s, text Meta data.

(.OKT) - Oktalyzer modules: 8-bits, mono, loop, name, collection.

(.OMA) - Sony OpenMG Audio File: The OMA extension indicates a compressed audio file created with Sony’s Adaptive Transform Acoustic Coding. Commonly referred to as ATRAC, the compression algorithm was developed by Sony and first used for commercial purposes in 1992.The OMA format is used for files encrypted with OpenMG, a SDMI compliant DRM (Digital Rights Management) system developed by Sony. Sony used OMA files for selling music online through the Connect Music store which was shut down in 2008. They may contain Digital Rights Management Protection to prevent playback on unauthorized devices. Audio data contained by OMA files is compressed to approximately 1/20 the data rate of a CD track. Even though they are considerably smaller, the loss in perceptible quality remains minimal.

(.OPUS) - Opus audio streams: Mono / stereo, compresses to ~6-510 kbit/s, text meta data.

(.OSP) - Orion Sampler programs: 16-PCM / 32-bit float, mono, instrument, layers, loop.

(.OUT) - Roland S-7xx series floppy image (S-70,S-700,S-750,S-760,S-770,S-772): 12 / 16-bits, mono, loop name, fine-tune, lfos, envelopes, layers, instruments, collection, multiple filter types.

(.P) - AKAI S900/S950 programs + CD-ROM's: These samplers use proprietary CD-ROM and floppy disk formats that can't be read by Windows. It is thus necessary to talk directly with the floppy disk or CD-ROM hardware. you'll have to use free 3rd party programs (search for ADISK or AkaiDisk) to transfer stored the files to the PC, also see .AKAI format. 12-bits, mono, instrument, dual layering, loop, name, sample start & end offsets, low-pass filter.

(.P) - AKAI S1000/S1100/S01 programs + CD-ROM's: 16-bits, mono, instrument, layers, loop, name, sample start & end offsets, low-pass filter.

(.P) - AKAI S3000/S3200/S2000/S2800 programs + CD-ROM's: 16-bits, mono, instrument, layers, loop, name, sample start & end offsets, low-pass filter.

(.P3K) - Kurzweil PC3K files: 16-bits, mono, loop, names, layers, instruments, collection, MIDI song, trigger type.

(.PAC) - SB Studio II package files: 8 / 16-bits, mono, loop, name, collection.

(.PAF) - Ensoniq PARIS audio files: 16 / 24-bits, mono / stereo / multi.

(.PAT) - Gravis UltraSound GF1 patch files: 8 / 16-bits, mono, loop (incl. fractional), envelopes, lfos, names, instruments.

(.PBF/ .PPF) Turtle Beach Pinnacle bank/program files: The format stores waveforms in external .WAV files that must be placed in the same directory as the .PBF file. 8 / 16-bits, loop, name, lfos, envelopes, layers, instruments, drum-kit, collection, sample start offsets, multiple filter types.

(.PCAST) - iTunes Podcast file format: PCAST (iTunes Podcast) is a special type of XML file developed by Apple Inc., used for sharing podcasts with their iTunes application. PCAST files allow iTunes users to subscribe to various podcast feeds. However, they contain no audio data on their own, but just a reference to the location of the latest podcast episodes.A standard PCAST file is an XML file fully compliant to the RSS 2.0 Specification. It usually contains special iTunes RSS tags, which specify additional information about the author and topic of the podcast. The iTunes RSS tags may be also used to define things such as: a set of keywords that describe the podcast in greater detail, a brief summary of the podcast topic, or a category that the podcast fits into.A special tag defines the URL, length (in bytes) and MIME type of the podcast. Supported audio-only file types are MP3 and M4A. However, certain PCAST files may also carry information about video podcasts. Being an XML file, besides iTunes, a PCAST can be easily opened with any text editor for further tweaking and/or data extraction.New PCAST files can be easily created by just dragging a podcast feed a user is subscribed to from the iTunes app interface directly to the desktop.

(.PCG) - Korg Trinity / Triton / LE / M3 / M50 / Kronos program - bank files: The PCG file must always be accompanied by a KSC file of the same name, listing the KMP and KSF files that needs to be loaded to use the programs in the PCG. When writing Trinity PCG files. 8 / 16-bits, mono, loop, names, instruments, collection, multiple filter types, trigger type.

(PCM) - Pulse Code Modulation: PCM is the most common representation of uncompressed audio signals. This method of coding yields the highest fidelity possible when using digital storage. PCM is the standard format for .wav and .aif files.

(.PCM) - OKI MSM6376 synth chip format: This format supports the following sample frequencies: 4000, 5300, 6400, 8000, 10600, 12800, 16000, 21200, 32000 Hz. When saving files, the nearest supported frequency will be used and the waveform first resampled if it is not exactly the same frequency. To save in a certain frequency, first manually resample the waveform to that frequency. 16-bits, mono.

(.PEK) Adobe Peak Waveform File: The PEK file extension is associated with the Adobe Creative Suite, version 4 and later. Developed by Adobe Systems Inc., the suite is designed for video and audio editing, graphic design and web development. PEK files are created each time the user imports audio data into Adobe Soundbooth, Encore, After Effects or Premiere Pro.For improved performance all the applications above use the Adobe Media Encoder, a standalone component of the Adobe Creative Suite, to create CFA files which are conformed to a proprietary format owned by Adobe. The new format is easier to access and to parse resulting in shorter processing times.When creating and caching CFA files which contain audio data, the Adobe Media Encoder also creates PEK files. These contain the visual waveform data displayed on the audio track timeline. Both CFA and PEK files can be found and moved/deleted manually from the project directory but the Media Encoder will create them again if the data is needed. This can be avoided by disabling caching.

(.PGM) - AKAI MPC 1000/2000XL/2000/2500/3000 drum set files: the MPC-1000, the MPC-2000, the MPC-2000XL and the MPC-3000 all use different program formats although they all have the same .PGM extension. Only the MPC-2500 use the same format as the MPC-1000. Actually the MPC-2000 and MPC-2000XL both use the same PGM file format, but the latter (like the MPC-1000/2500) requires samples in .WAV format, while the former needs them in .SND format (like the MPC-3000).

(.PLA) - Playlist File: Playlist file used by various media players to play media files in a given sequence.

(.PLS) - PlayList File: A .pls file is a playlist, a listing of digital media files (e.g music tracks) sorted in the intended order. This list is then used by your media-player to play the media in the correct sequence. Playlists are often used with music albums, where the included playlist will inform your media player that tracks should be played in their original order (track 1 followed by track 2 etc).These files do not contain any media data, instead they contain a (text) listing of the file names.

(.PLM/.PLS) - DisorderTracker2 modules/samples: 8 / 16-bits, mono, loop, name, collection.

(.PRG) - WAVmaker program files: 8 / 16-bits, mono / stereo, loop, name, instrument, sample start & end offsets.

(.PSB) - Turtle Beach Pinnacle sound banks: This format is a list with assignments of .WAV files to MIDI program numbers. 8 / 16-bits, mono/stereo, loop, name, instrument, drum-kit.

(.PSION) - PSION a-law files: A-law, mono.

(.PSM)- Protracker Studio modules: 8 / 16-bits, mono, loop, name, collection.

(.PTM) - Poly Tracker modules: 8 / 16-bits, mono, loop, name, collection.

(.QCP) - Voice File: The .QCP file extension belongs to an audio format created by Qualcomm for storing voice audio data. Although originally designed for storing voice audio, the format has become popular with mobile phone manufactures (such as LG) for storing ring-tones.It is reported that renaming the extension from .qcp to .wav allows the format to be played in Windows Media Player.

(.RA) - RealAudio files: The .RA file format was created by Real Networks for their media player, RealPlayer.These files usually contain a reference to a location of a streaming audio file on the internet although these files can also contain actual audio data.The file format is compressed using a proprietary compression algorithm, again developed by Real Networks.These files are commonly played through the RealPlayer web-browser plug-in. Voice/Music/Stereo music 8, 11, 16, 22, 32, 44.1 kHz, 20, 34, 45, 80, 150 kbit/s.

(.RAM) - RealMedia Metafile: The .RAM file format is simply a plain-text file that contains a link to a ReadAudio file (.ra extension).

(.RAW.SB/.SDW/.SND/.SW/.UB/.UDW/.UW) Raw PCM data formats  Signed 8-bit PCM data: The file extension has the following meaning:   (.S)   Signed data        (.U)  Unsigned data   (.B)   Byte (8-bit) data (.W)       Word (16-bit) data   (.DW)    DWord (32-bit) data.

(.RAW) - Rdos Raw OPL capture format: Song, FM-synthesis instruments.

(.RAX) - Real Music Store Audio File: The .RAX file format belongs to music purchased through the online 'Real Music Store'. These files are intended to be played through Real Player.

(.REX) - Audio Sample File:The.REX file extension is used in audio applications for storing audio samples.

(.RFL) - Reason ReFill Sound Bank: RFL files are a component package for the Propellorhead Reason software package. These files can contain patches to update the Propellorhead Reason program as well as various sound samples that can be used in song creation, full song files that can be used by the program, and audio loop formats stored as REX files.In this format, songs and sound samples will often be found compressed to under half their original size.

(.RNS) - Reason Song File: Propellorhead Reason is an audio production software suite that allows song composition and mixing. The RSN file stores the mixing, sequencing, and rack settings from inside the software. However, because RSN files are not actually audio files, they contain no audio data. RSN files simply save the settings for the audio file being created or edited so that opening the RSN file will restore the settings that were being used. RSN files are actually project files.

(.RSD) - Roland Sound File: The .RSD file format is used by Roland's Visual MT music Tutor application.

(.RSO) - NXT Brick Audio File: The .RSO file extension is used in Lego Mindstorms NXT programming.

(.RX2) - REX2 Loop File: (REX2 Loop) is a proprietary audio file format developed by Swedish music software company Propellerhead for use with their ReCycle music loop editor.The idea behind ReCycle was to enable music producers to easily create new and/or edit existing music loops, allowing them to alter the tempo of the loops, without changing their pitch and without negatively affecting the sound quality.Originally released in 1994, ReCycle made a true revolution in computer music production, being the first application to bring the idea of loop slicing to the mainstream. The REX2 file format is nowadays a standard in audio sample looping and is supported by all major DAWs, such as Reaper, Logic, Cubase, Reason and Pro Tools.REX2 files can either be mono or stereo, and utilize a proprietary non-lossy compression algorithm, which can reduce their file size by up to 60%.The name REX stands for ReCycle Export, since REX was the native export format for Propellerhead ReCycle.

(.RIF) - Rockwell ADPCM format (Hotfax/Quicklink): 2, 3, 4-bit ADPCM, 7200 Hz, mono.

(.RMI) - RIFF-MIDI files: This is a structured file format containing MIDI data plus some additional optional data like comments etc. However, perhaps the most spectacular feature is that it can also contain a DLS instrument collection. This is a new addition to the format so far from all software that handles RMI files may support it yet though.

(.ROCKWELL) - Raw Rockwell 2/3/4-bit ADPCM data: 2 / 3 / 4-bit ADPCM, 7200 Hz, mono.

(.ROL) - AdLib Visual Composer songs: This format contains song data only. It is often accompanied by a .BNK file containing FM-synthesis instruments. MIDI song data.

(.ROM) - Roland MT-32 / CM32L / LAPC-1 control and PCM ROM dumps: LA-synthesis instruments, 16-bit PCM, loop.

(.S) - AKAI S900/S950 samples: 12-bits, mono, loop, name.

(.S) - AKAI S1000/S1100/S01/S3000/S3200/S2000/S2800 samples: 16-bits, mono, loop, name.

(.S1A) - Yamaha EX5 'all' format: 16/8-bits, name, envelopes, lfos, filters, layers, instruments, collection.

(.S1M) - Yamaha EX5 'waveforms' format: 16/8-bits, name, envelopes, lfos, filters, layers, instruments, collection.

(.S1V) - Yamaha EX5 'voices' format: 16/8-bits, name, envelopes, lfos, filters, layers, instruments, collection.

(.S3M/.S3I) - ScreamTracker v3 modules / instruments: 8 / 16-bits, mono / stereo, loop, name, note, collection.

(.S3P) - AKAI MESA II/PC S-series programs: The S3P format contains an S3000 program, but encoded in a 'SysEx' like format and is used by the MESA II/PC editor. 16-bits, mono, instrument, layers, loop, name, low-pass filter.

(.SA1) - Audio Encryption File: Files with the extension .SA1 are panasonic 'AAC' files data wrapped in SD (secure digital) audio encryption layer.AAC files (Advanced Audio Coding) is a standardized, lossy compression and encoding scheme for digital audio. The AAC format was designed to replace the MP3 format. An .SA1 file is an AAC file wrapped in a SD audio encryption layer and is used by Panasonic for digital rights management.

(.SAM) - Signed 8-bit PCM files: 8-bits, mono.

(.SBI) - Creative Labs FM instruments: FM-synthesis instruments, song.

(.SBK) - EMU SoundFont v1.x banks: The .SBK format (SoundFont v1) has been replaced with .SF2 (SoundFont v2) which should be used for all new files. 16-bits, loop, name, lfos, envelopes, layers, instruments, drum kits, collection, sample start & end offsets, low-pass filter.

(.SBR) - Spectral Band Replication Audio Sound File: Popular in video games, these SBR files are used to store audio data (such as crowd chants/commentary).

(.SC2) - Sample Cell II PC/Mac instruments 8 / 16-bits mono, instrument, sample start offsets.

(.SD)- Sound Designer I files: 8, 16-bits, mono, name, loop.

(.SD2) - Sound Designer II flattened/resource fork files: On the Macintosh these files are really two file 'forks'. When they are transferred, to a PC these two forks may be flattened (preserving all data and parameters) or only the data fork (containing the raw sound data) may be copied. If only the data fork has been copied, then all information about sample rate and data format has been lost when it was moved to the PC.  8 / 16-bits, mono / stereo.

(.SDK) - Roland S-5xx / S-7xx series floppy disk images + CD-ROM's (S-50, S-51, S-330, W-30, S-500, S-550, S-70, S-700, S-750, S-760, S-770, S-772): 12 / 16-bits, mono, loop name, fine-tune, lfos, envelopes, layers, instruments, collection, multiple filter types.

(.SDS/.SDX) - MIDI Sample Dump Standard files: SDS is a raw MIDI data dump of an SDS (Sample Dump Standard) transfer and can be up to twice as large as the actual waveform. SDX is a 'compacted' form that the program SDX uses to save SDS samples in order to avoid this problem. It also contains a sample name, which SDS does not. 8...32-bits, mono, loop, (SDX only: name, note).

(.SDS) - SmartSound SDS files: 8..32-bits.

(.SEQ) - Sony Playstation MIDI sequences: MIDI song data.

(.SF) - IRCAM / MTU SoundFile formats: 16-bit PCM / 32-bit float, name, note, mono / stereo.

(.SF2) - EMU SoundFont v2.x banks: 16 / 24-bits, loop, name, lfos, envelopes, layers, instruments, drum kits, collection, sample start & end offsets, low-pass filter.

(.SF2PACK) - MIDI Converter Studio packed Sound Font: This format is based on the Sound Font 2 format, but uses WavPack to compress the waveforms. 16-bits, loop, name, lfos, envelopes, layers, instruments, drum kits, collection, sample start & end offsets, low-pass filter.

(.SFA) - Sound Forge Audio File: The SFA file format was developed by Sonic Foundry for their audio and video editing applications. The company was acquired by Sony in late 2003. SFA files are currently associated with Sony Sound Forge. Files with the SFA extension are lossless audio files that offer near CD quality sound. Due to their nature, SFA files are larger in size when compared to other compressed audio formats.

(.SFARK) - Melody Machine compressed SoundFonts: These files are a compressed archive containing an SF2 SoundFont. The compression ratio is typically around 50% but might vary from file to the other.

(.SFI + .SFD) - SoundStage sound files: These files must always come in a .SFI + .SFD pair! The .SFI or 'Sound File Info' file contains the sound parameters, the .SFD or 'Sound File Data' file contains the actual audio clip. You should only load the .SFI file - the data from the .SFD file will be loaded automatically.

(.SFR) - Sonic Foundry sample resource files: 8 / 16-bits, mono / stereo.

(.SFZ) - rgc:audio SFZ v1 / Cakewalk SFZ v2 instruments: 8 / 16 / 24 / 32-bit PCM / Ogg compressed / FLAC lossless, loop, name, lfos, envelopes, layers, instruments, sample start & end offsets, multiple filter types, trigger type, pedal switch.

(.SGT) - Microsoft DirectMusic Producer Segments File: Used by developers to add audio to their applications to be played through DirectX.

(.SHN) - Shorten lossless compression: This is one of the first more wide-spread formats for lossless audio compression. 8/16-bit PCM, lossless compression, multi-channels.

(.SID) - PlaySID C64 Sound Effects File: Audio sound effects file, containing audio data for the Commodore 64 program, PlaySID.

(.SMD) - J-Phone / SmdEd mobile songs: Song data.

(.SMF) - Standard Midi File: The SMF extension stands for "Standard MIDI File". The Musical Instrument Digital Interface (MIDI) specification was developed to meet the musicians' need for a way to connect several different musical instruments with computers and other electronic devices.The MIDI protocol was quickly adopted for early personal computers as it was an excellent solution for storage and playback in exchange for little volume space. SMF files contain the characteristics of a musical event including the start and end of a note, its volume, its pitch and its vibrato.The MIDI protocol has a data rate of 31.25 Kbs, uses 8-bit serial transmission and is asynchronous.

(.SMP) - Samplevision files: 16-bits, mono, loop, name, note.

(.SMP) - Ad Lib Gold samples: 8 / 16-bits, mono / stereo.

(.SMP) - Avalon samples: 8 / 16-bits, mono, loop, name, comment.

(.SND) - AKAI MPC-60/2000/2000XL/3000 sample files: 12/16-bits, mono/stereo, name.

(.SND) - Apple Sound Resource File: Files with the SND extension are attributed to Apple Inc and their Macintosh platform. The SND file format was developed for Mac OS Classic and it was mostly used for games and various programs. SND files contain commands interpreted by the Macintosh Sound Manager, sound samples and wave-table instruments.SND files contain 8 bit mono / 8 KHz sound. Despite the low quality, using current technology SND files can reach 22 KHz for stereo and 11 KHz for mono. Also, due to their small size and basic format, SND files are often used for integrating media files into Web Documents and for Internet Streaming.

(.SNDR) - Sounder sound files: 8-bits, mono.

(.SNDT) - SndTools sound files: 8-bits, mono.

(.SNS) - Burnout Paradise Sound File: The .SNS file extension is used by Criterion Games Burnout Paradise. a driving game for the PC, XBOX 360 and PS3.Criterion used the .SNS file format to store soundtrack music in the game.

(.SOU) - SB Studio II sound files: 8 / 16-bits, mono, loop, name, collection.

(.SPD) - Speech data files: 16-bits, mono.

(.SPL) - Digitrakker sample files: 8, 16-bits, mono, loop, name, huffman packing, collection.

(.SPPACK) - SPPack sound samples: 8 / 16-bits / μ-Law / A-Law, mono.

(.SQ) - Sony PS2 SCEI sequences: MIDI song data.

(.STM) - ScreamTracker v2 modules: 8-bits, mono, loop, name, collection.

(.STS) - Creamware STS-series sampler programs: Only newer versions of the STS samplers use this format - older versions use the AKAI S3000 .P format. 16-bits, mono / stereo, instrument, layers, loop, name, multiple filter types.

(.SVQ) - Roland sequencer files: are used by the built in sequencer in several Roland synths. MIDI song data.

(.SVX) - Interchange file format: 8SVX and 16SV data types: 8 / 16-bits, loop, name, mono / stereo.

(.SWA) - ShockWave Audio: Contains audio data for flash animations, these .SWA files are created by Adobe ShockWave and are similar to the popular .MP3 format.

(.SXT) - Propellerheads Reason NN-XT format: 16-bits, mono / stereo, instrument, layers, loop, name, articulation, sample start & end offsets, multiple filter types.

(.SYX) - Roland D-50 / MT-32 / Yamaha DX7 / DX7s / DX7II / DX200 / DX21 / DX27 / DX100 / DX11 / TX81z patch SysEx dumps: LA-synthesis instruments.

(.SYW/ W??) - Yamaha SY-series wave files: The Yamaha 16-bit SY-series wave sample files are really named .W??. There's also .T?? (All Data Files, often contains waves and are much more common than .W.J?? (Patch parameters?) and .K?? (Sequenced songs). 16-bits, mono, loop.

(.TRM) - For The Record Voice Recording File: The TRM file format is used by 'ForTheRecord' and is an audio file used to store voice recordings in courts.

(.TVN) - Yamaha Tyros 2 custom voice files: 16-bits, mono, loop, envelopes, lfos, filters, layers, and instrument.

(.TVD) - Yamaha Tyros 2 custom drum voice files: 16-bits, mono, loop, envelopes, lfos, filters, layers, and instrument.

(.TXT) - Ascii text parameter description files: Contains human readable information about items at bank, instrument or waveform levels. Useful if you can't export directly to your destination format and you'll have to piece together instruments from, say, .WAV files. Human readable information, no sample data.

(.TXT) - Ascii text formatted audio data: Ascii text file with integer sample values in base 10. Samples are delaminated by either , (ascii no 44) or new-line (ascii no 10). Comments and lines not containing sample values must begin with a ; or a %. For stereo files (with interleaved samples), you must manually set stereo in the waveforms properties box source tab. 1..32 bits PCM / floats.

(.TXT) - RTTTL / Nokring mobile ring-tone format: the NokRing software first used The RTTTL - you can use that, or other similar compatible software to transfer ring-tones to your Nokia phone. Song, name.

(.TXT) - Steinberg LM-4 banks: 8 / 16-bits, mono / stereo, loop, names, instrument.

(.TXW/.W??) - Yamaha TX16W wave files: The Yamaha TX16W (and probably also the other Yamaha 12-bit samplers) waveform files are really named .W?? (where ?? is a number). There's also .F?? (Filter), .V?? (Voice to MIDI no assign?),.U?? (Performance settings) and .S?? (System setup?) Files, which are of no use to you. 12-bits, mono, loop.

(.U255LAW) - Exponential 8-bit format: These are used e.g. by some old drum computers. There is no standard extension for these files, and no way to auto-detect them. 8-bit exp, mono.

(.UAX/.UMX) - Unreal Tournament audio/music packages: 8 / 16-bits, mono / stereo.

(.UL) - Audio file: Audio file created with ULAW, which uses Ulaw encoding.

(.ULAW/.ULW) - Raw CCITT/ITU G.711 μ-Law (US telephony format) audio: This is also the format used by the MIME mail encoding standards audio/basic attachments.Some applications saves these with a 'reverse' bit ordering within each byte. μ-Law, mono, 8 kHz.

(.ULT/.UWF) - UltraTracker modules/wave files: 8 / 16-bits, mono, loop, name, collection.

(.UNI) - MikMod 'UniMod' modules: 8 / 16-bits, mono, name, loop, instruments, collection.

(.UVN) - Yamaha Tyros 3 custom voice files: 16-bits, mono, loop, envelopes, lfos, filters, layers, and instrument.

(.UVD) - Yamaha Tyros 3 custom drum voice files: 16-bits, mono, loop, envelopes, lfos, filters, layers, and instrument.

(.V8) - Covox 8-bit files: 8-bits, mono.

(.VAB) - Sony Playstation / PS2 bank files: A VAB file can contain a maximum of 128 instruments (called programs), each of which can have up to 16 regions (called tones). If an instrument has more regions, only some of the lowest ones in the lowest layers are written. 4-bit ADPCM, mono, name, envelope, instruments, collection.

(.VAG) - Sony Playstation / PS2 compressed sound files: Audio file used by the Sony Playstation, these sound files are used to store game audio. Due to a limitation of the format, loops points will be aligned to the nearest '28 samples' boundary when writing files. 4-bit ADPCM, mono, name.

(.VAP) - Annotated speech files: 8-bit PCM, mu-Law, A-Law, Dialogic 4-bit ADPCM, mono, name.

(.VM1) - Panasonic voice files: ADPCM 4-bit lossy compression, mono.

(.VMO) - Siemens Mobile Phone Voice File: The .VMO fle format was used by Siemens' mobile cell phones but is no longer used or supported. These files can be converted to .wav format using the vmo2wav application.

(.VOC) - Creative Labs sound files: 8 / 16-bits / μ-Law / A-Law / 2/2.67/4-bit ADPCM, mono / stereo, name.

(.VOX/.VOX-6K/.VOX-8K) - Dialogic 4-bit ADPCM files: VOX files are associated with Dialogic's Adaptive Differential Pulse Code Modulation (ADPCM) format. Just like any other ADPCM audio file, Dialogic VOX files compress data at a low 4 bit sampling rate. Originally intended for saving human speech, VOX files were optimized to store digitized voice data at a low sampling rate while still maintaining clarity. Another benefit of using VOX files is their small size when compared to other audio files.The VOX ADPCM audio format is mostly used for computer telephony software. It was also used for computer and arcade games.There are several types of 'Dialogic' files - ADPCM 8000 Hz, ADPCM 6000 Hz, PCM8, mu-Law, A-law. These cannot be auto detected and can all use the same file extension. ADPCM compression (4-bit) / PCM 8-bit / mu-Law / A-Law, mono.

(.VOX) - Talking Technology Incorporated files: 8-bits, mono.

(.VPM) - Garmin GPS Navigation Voice File: Voice file used by Garmin personal navigation GPS devices The .VPM extension belongs to voice files used by Garmin GPS navigation devices.

(.VRF) - Ventrilo Audio Recording: The .VRF file format is used by the Voice over IP (VoIP) group communication tool 'Ventrilo'.

(.VY1/VY2/VY3) - Audio Footage File: Files with the extension .VY1, .VY2, .VY3, and so on are audio footage files recorded using the 'Samsung Yepp VY' series of digital voice Recorders. The .VY? file contains audio footage recorded onto the voice recorders internal memory, this can then be uploaded onto a PC.

(.VSB) - Virtual Sampler banks: 16-bits, loop, name, lfos, envelopes, layers, instruments, drum kits, collection, sample start & end offsets, multiple filter types.

(.W2A+.W3A) - Yamaha Motif 'all' format: 16-bits, name, envelopes, lfos, filters, layers, instruments, collection.

(.W2V+.W3V - Yamaha Motif 'voices' format: 16-bits, name, envelopes, lfos, filters, layers, instruments, collection.

(.W2W+.W3W) - Yamaha Motif 'waveforms' format: 16-bits, name, envelopes, lfos, filters, layers, instruments, collection.

(.W4KSND) - Wusik 4000 instrument: 6/24/32-bit PCM / 32-bit floats, mono/stereo.

(.W7A+.W8A) - Yamaha Motif ES 'all' formats: 16-bits, name, envelopes, lfos, layers, filters, instruments, collection, multiple filter types.

(.W7V+.W8V - Yamaha Motif ES 'voices' formats: 16-bits, name, envelopes, lfos, layers, filters, instruments, collection, multiple filter types.

(.W7W+.W8W - Yamaha Motif ES 'waveforms' formats: 16-bits, name, envelopes, lfos, layers, filters, instruments, collection, multiple filter types.

(.W64) - Sonic Foundry Wave-64 formats: Files with the extension .W64 are audio files created by 'Sonic Foundry'. .W64 files or 'WAVE64' files were developed to overcome the restrictions of the 4GB limit of the Microsoft 'WAV' format.* Sony bought Sonic Foundry’s editor assets (31/07/2003).1..32 bits PCM / μ-Law / A-Law, mono / stereo.

  • A .W64 file is a binary file similar to a RIFF / WAV file.
  • A .W64 file usually stores uncompressed sampled audio as 'PCM' (pulse-code modulation).

(Wave) - A digital audio standard developed by Microsoft and IBM. One minute of uncompressed audio requires 10 MB of storage. The .WAV format is a standard audio format for the Windows operating systems and professional level audio/video applications. The format is not compressed and is lossless (no reduction in quality) and is ideal for storing high-quality audio. As the format can contain such high-quality audio, the file sizes are relatively large compared to other compressed formats, such as MP3.

(.WAV) - Microsoft wave format: 1..32-bit PCM / 32 / 64-bit floating point / μ-Law / A-Law / Microsoft 4-bit ADPCM / Intel DVI/IMA 2/3/4-it ADPCM / G.721 4-bit ADPCM / G.723 3/5-bit ADPCM / G.726 2/3/4/5-bit ADPCM / Dialogic 4-bit ADPCM / Rockwell 2/3/4-bit ADPCM / Yamaha 4-bit ADPCM / GSM 06.10 / MPEG audio layer I / II / III, MPEG AAC / Vorbis Ogg / AC3 / DTS / any format with an 'ACM codec', mono / stereo / multi-channel, note, loop, root-key, fine-tune, name, comment et c.

(.WAV/.BWF) - Broadcast wave format (EBU BWF): This format, defined by the European Broadcasting Union, is essentially the same as a Microsoft wave format, but with restrictions on what data formats are allowed, and with some extra Meta data stored in them. Normally they also use the .WAV file extension and not .BWF, even though that also occurs. Any application that can read BWF files also ought to be able to read PCM data format WAV files, and vice versa. 8 / 16 / 24 / 32-bit PCM / MPEG audio layer II, mono / stereo, name, comment etc.

(.WA!) - GigaStudio/GigaSampler compressed wave files: 8, 16-bits lossless PCM compression.

(.WFB/.WFP/.WFD) - Turtle Beach WaveFront / WavePatch formats: WaveFront based synthesizers are currently the Maui, Tropez, Rio and Monterey..WFB files contains a whole MIDI Bank, .WFP a single Program and .WFD a complete drum set. 8 / 16-bits / μ-Law, name, note, loop (incl. fractional), envelopes, lfos, layers, instruments, drumkit, collection, sample start & end offsets.

(.WLF) - id Software Music Format: Song, FM-synthesis instruments.

(.WMA) - Windows Media Audio files: The .WMA format was created by Microsoft and is based on the MP3 format but makes significant improvements to the audio quality while retaining similar file sizes.The format is most commonly used for playing audio across the internet.Due to political reasons, these files cannot be played on Apple's iPod but can be played on other MP3 players such as (not surprisingly) Microsoft's Zune. 16 / 24 bit mono / stereo, 8, 11, 16, 22, 32, 44.1, 48, 88, 96 kHz, compresses to 5-160 kbit/s, text metadata.

(.WMV) - Windows Media Video files: 16 / 24 bit mono / stereo, 8, 11, 16, 22, 32, 44.1, 48, 88, 96 kHz, compresses to 5-160 kbit/s, text meta data.

(.WPROJ) - Wwise Project: The .WPROJ file format is used by Wwise, an audio run-time engine developed by Audiokinetic. These are project files using the XML file format.

(.WRF) - Westacott WinRanX instrument files: 16/24/32-bit PCM, mono, loop.

(.WRK) - CakeWalk work files: MIDI song data, embedded FM or MT32 SysEx banks, linked SoundFonts.

(.WUSIKSND) - Wusikstation sound file: 16-bit PCM / 32-bit floats, mono/stereo.

(.WUSIKPACK) - Wusikstation pack file: 16-bit PCM / 32-bit floats, mono/stereo, instruments.

(.WV) - WavPack lossless compression: This format is well suited e.g. for compressing important archive data without loosing any quality. 8/16/24/32-bit PCM, 32-bit floating point, lossless compression, multi-channels, gain adjustment (Replay Gain), text Meta data.

(.X0A) - Yamaha Motif XS 'all' format: 16-bits, mono/stereo, name, envelopes, lfos, filters, layers, instruments, collection, trigger type.

(.X0V) - Yamaha Motif XS 'voices' format: 16-bits, mono/stereo, name, envelopes, lfos, filters, layers, instruments, collection, trigger type.

(.X0W) - Yamaha Motif XS 'waveforms' format: 16-bits, mono/stereo, name, envelopes, lfos, filters, layers, instruments, collection, trigger type.

(.X3A) - Yamaha Motif XF 'all' format: 16-bits, mono/stereo, name, envelopes, lfos, filters, layers, instruments, collection, trigger type.

(.X3V) - Yamaha Motif XF 'voices' format: 16-bits, mono/stereo, name, envelopes, lfos, filters, layers, instruments, collection, trigger type.

(.X3W) - Yamaha Motif XF 'waveforms' format.: 16-bits, mono/stereo, name, envelopes, lfos, filters, layers, instruments, collection, trigger type.

(.XM/.XI) - FastTracker 2 eXtende modules/instruments: 8 / 16-bits, mono, loop, name, instruments, panning, collection.

(.XMI) - Miles Sound System extended MIDI files: These files are a type of 'time quantized' MIDI songs. They are usually a little smaller than a regular MID file but may in some cases loose a little information. You can also combine an XMI with a DLS into an MSS file. MIDI song.

(.YADPCM) - Raw Yamaha 4-bit ADPCM format: ADPCM 4-bit lossy compression, mono.

(.ZGR) - BeatCreator Loop File: The file extension .ZGR is associated with 'BeatCreator' an audio sample/loop editing program. .ZGR files contain the slicing scheme of the saved loop.BeatCreator allows you to edit samples in a variety of ways and then export them as a whole or in slices to your loop creation software such as 'Fruityloops'.

(.???) - Yamaha A3000 sample files: These files do not really have any file extension - they are named stuff like e.g. 'F001'. 16-bits mono, loop, name.