Free Lossless Audio Codec

Developer:	Xiph.Org Foundation
Latest release:	1.1.4 / February 13, 2007
OS:	Cross-platform
Use:	Audio codec Encoder
License:	GPL
Website:	flac.sourceforge.net

FLAC, an acronym for Free Lossless Audio Codec, is a popular file format for audio data compression. Being a lossless compression format, FLAC does not remove information from the audio stream, as do lossy compression formats such as MP3, AAC and WMA. Image File history File links FLAC_logo. ... Software development is the translation of a user need or marketing goal into a software product. ... The Xiph. ... A software release refers to the creation and availability of a new version of a computer software product. ... February 13 is the 44th day of the year in the Gregorian calendar. ... 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the Anno Domini (common) era. ... An operating system (OS) is a computer program that manages the hardware and software resources of a computer. ... A cross-platform (or platform independent) programming language, software application or hardware device works on more than one system platform (e. ... An audio codec is a computer program that compresses/decompresses digital audio data according to a given audio file format or streaming audio format. ... An encoder is a device used to encode a signal (such as a bitstream) or data into a form that is acceptable for transmission or storage. ... A software license is a legal agreement which may take the form of a proprietary or gratuitous license as well as a memorandum of contract between a producer and a user of computer software. ... The GNU logo The GNU General Public License (GNU GPL or simply GPL) is a widely-used free software license, originally written by Richard Stallman for the GNU project. ... A website (or Web site) is a collection of web pages, typically common to a particular domain name or subdomain on the World Wide Web on the Internet. ... An acronym is a word, formed from the initial letter or letters of other words (, RAM, scuba, PETA). ... This article is about free software as defined by the sociopolitical free software movement; for information on software distributed without charge, see freeware. ... Lossless data compression is a class of data compression algorithms that allows the exact original data to be reconstructed from the compressed data. ... A U.S. Postage Stamp commemorating one hundred years of sound recording. ... A Codec is a device or program capable of performing encoding and decoding on a digital data stream or signal. ... A file format is a particular way to encode information for storage in a computer file. ... Audio compression is a form of data compression designed to reduce the size of audio files. ... A lossy data compression method is one where compressing data and then decompressing it retrieves data that may well be different from the original, but is close enough to be useful in some way. ...

Like other methods of compression, FLAC's main advantage is the reduction of bandwidth and/or storage requirements, but without sacrificing the integrity of the audio source. For example, a digital recording (such as a CD) encoded to FLAC maintains the quality of the audio perfectly. Audio sources encoded to FLAC are typically reduced in size 40 to 50 percent. FLAC is suitable for everyday playback and audio archival, with support for tagging, cover art and fast seeking. FLAC's open source royalty-free nature makes it well-supported by many software applications. FLAC playback support in portable audio devices and dedicated audio systems is growing.[1] Josh Coalson is the primary author of FLAC. This article or section does not cite its references or sources. ... Open source refers to projects that are open to the public and which draw on other projects that are freely available to the general public. ...

On January 29, 2003, Xiphophorus (now called the Xiph.Org Foundation) announced the incorporation of FLAC under their banner, alongside Vorbis, Theora, Speex, and others. January 29 is the 29th day of the year in the Gregorian calendar. ... 2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... The Xiph. ... This article is about the audio compression codec. ... Theora is a video codec being developed by the Xiph. ... Speex is a free software speech codec that claims to be unencumbered by patent restrictions. ...

The project

The FLAC project consists of:

• the stream format
• a simple container format for the stream, also called FLAC (or Native FLAC)
• libFLAC, a library of reference encoders and decoders, and a metadata interface
• libFLAC++, an object wrapper around libFLAC
• flac, a command-line wrapper around libFLAC to encode and decode FLAC streams
• metaflac, a command-line metadata editor for .flac files and for applying Replay Gain
• input plugins for various music players (Winamp, XMMS, foobar2000, musikCube, and many more)
• With Xiph.org incorporation, the Ogg container format, suitable for streaming (also called Ogg FLAC)

"Free" means that the specification of the stream format can be implemented by anyone without prior permission (Xiph.org reserves the right to set the FLAC specification and certify compliance), and that neither the FLAC format nor any of the implemented encoding/decoding methods are covered by any patent. It also means that the reference implementation is free software and the sources for libFLAC and libFLAC++ are available under Xiph.org's BSD license, and the sources for flac, metaflac, and the plugins are available under the GPL. A container format is a computer file format that can contain various types of data, compressed by means of standardized codecs. ... Replay Gain is a proposed standard published in 2001 to normalize the perceived loudness of computer audio formats such as MP3 and Ogg Vorbis. ... Winamp is a multimedia player made by Nullsoft. ... XMMSs default appearance The X Multimedia System (XMMS) is a free audio player very similar to Winamp, that runs on many Unix-like operating systems. ... foobar2000 is a freeware audio player for Windows developed by Peter Pawlowski, a former freelance contractor for Nullsoft. ... musikCube is an open source audio player with library support. ... Look up Ogg in Wiktionary, the free dictionary. ... This article is about free software as defined by the sociopolitical free software movement; for information on software distributed without charge, see freeware. ... The BSD license is a permissive license and is one of the most widely used free software licenses. ... The GNU logo The GNU General Public License (GNU GPL or simply GPL) is a widely-used free software license, originally written by Richard Stallman for the GNU project. ...

In its stated goals, the FLAC project encourages its developers not to implement copy prevention features of any kind. [2]

Comparisons

FLAC is for efficient packing of audio data, unlike general lossless algorithms such as ZIP and gzip. While ZIP may compress a CD-quality audio file by 10–20%, FLAC achieves compression rates of 30–50% for most music, with significantly greater compression for voice recordings. The ZIP file format is the most widely-used compressed file format in the IBM PC world. ... gzip is short for GNU zip, a GNU free software replacement for the Unix compress program. ...

Lossy codecs can achieve ratios of 80% or more by discarding data from the original stream. FLAC uses linear prediction to convert the audio samples to a series of small, uncorrelated numbers (known as the residual), which are stored efficiently using Golomb-Rice coding. It also uses run-length encoding for blocks of identical samples, such as silent passages. The technical strengths of FLAC compared to other lossless codecs lie in its ability to be streamed and in a fast decode time, which is independent of compression level. Linear prediction is a mathematical operation where future values of a digital signal are estimated as a linear function of previous samples. ... Golomb coding is a form of entropy encoding invented by Solomon W. Golomb that is optimal for alphabets following geometric distributions, that is, when small values are vastly more common than large values. ... Run-length encoding (RLE) is a very simple form of data compression in which runs of data (that is, sequences in which the same data value occurs in many consecutive data elements) are stored as a single data value and count, rather than as the original run. ...

As with any lossless scheme, FLAC is also a popular archive format for owners of CDs and other media who wish to preserve their audio collections. If the original media is lost, damaged, or worn out, a FLAC copy of the audio tracks ensures that an exact duplicate of the original data can be recovered at any time. An exact restoration from a lossy archive (e.g., MP3) of the same data is impossible. A CUE file can optionally be created when ripping a CD. If a CD is read and ripped perfectly to FLAC files, the CUE file allows later burning of an audio CD that is identical in audio data to the original CD, including track order, pregaps, and CD-Text. However, additional data present on some audio CDs such as lyrics and CD+G graphics are beyond the scope of a CUE file and most ripping software, so that data will not be archived. This article or section does not cite its references or sources. ... A cue sheet, or cue file, is an ASCII (plain text) file that specifies how the tracks of a compact disc should be laid out. ... Ripping is the process of copying the audio or video data from one media form, such as Digital Versatile Disc (DVD) or Compact Disc (CD), to a hard disk. ... The pregap on a Red Book audio CD is the portion of the audio track that precedes index 01 for a given track in the table of contents (TOC). ... CD-Text is an extension of the Red Book standard for audio CDs. ... A CD+G (also known as CD+Graphics) is a special audio compact disc that contains graphics data in addition to the audio data on the disc. ...

For the best compression, but the longest encoding time this command can be used:

 flac --lax -mep -b 8192 -l 32 -r 0,16 input.wav -o output.flac 

The resulting file might not play on hardware players or be streamable, but it will work on software decoders. For a fully compliant file this command should be used instead:

 flac -mep -b 8192 -l 32 -r 0,8 input.wav -o output.flac 

The Hydrogenaudio Wiki features a comparison of lossless codecs, including FLAC.

Technical details

FLAC supports only fixed-point samples, not floating-point. This is to eliminate any rounding errors to ensure bit-perfect reproduction. It can handle any PCM bit resolution from 4 to 32 bits per sample, any sampling rate from 1 Hz to 1,048,570 Hz in 1 Hz increments, and any number of channels from 1 to 8. Channels can be grouped in cases like stereo and 5.1 channel surround to take advantage of interchannel correlations to increase compression. FLAC uses CRC checksums for identifying corrupted frames when used in a streaming protocol, and also has a complete MD5 hash of the raw PCM audio stored in its STREAMINFO metadata header. In mathematics, a fixed point of a function f is an argument x such that f(x) = x; see fixed point (mathematics). ... This article or section is in need of attention from an expert on the subject. ... PCM is an initialism which can have different meanings: Phase Change Material Pulse-code modulation, a way to digitally encode signals representing sound and their video counterparts Potential Cancer Marker Communist Party of Mexico Plug Compatible Manufacturer Power-train control module, a computer in a car which controls the car... Bit resolution is a term describing the dynamic range of a digital audio recording. ... This article is about the unit of information. ... The sampling frequency or sampling rate defines the number of samples per second taken from a continuous signal to make a discrete signal. ... The hertz (symbol: Hz) is the SI unit of frequency. ... Label for 2. ... It has been suggested that Multichannel audio be merged into this article or section. ... A cyclic redundancy check (CRC) is a type of hash function used to produce a checksum – a small, fixed number of bits – against a block of data, such as a packet of network traffic or a block of a computer file. ... In cryptography, MD5 (Message-Digest algorithm 5) is a widely used cryptographic hash function with a 128-bit hash value. ...

FLAC allows for Rice parameter between 0-16, and up to 8 channels of audio and a wide range of sampling rates up to 192 kHz, in various bits-per-sample width. FLAC also supports Replay Gain. Replay Gain is a proposed standard published in 2001 to normalize the perceived loudness of computer audio formats such as MP3 and Ogg Vorbis. ...

FLAC is implemented as libFLAC core encoder & decoder with the main distributable program flac being the reference program utilizing libFLAC API. This codec API is also available in the C++ as the libFLAC++. A Codec is a device or program capable of performing encoding and decoding on a digital data stream or signal. ...

The reference implementation of FLAC compiles on many platforms, including most Unix and Unix-like (including Linux, *BSD, Solaris, and Mac OS X), Windows, BeOS, and OS/2 operating systems. There are build systems for autoconf/automake, MSVC, Watcom C, and Project Builder. Filiation of Unix and Unix-like systems Unix (officially trademarked as UNIX®) is a computer operating system originally developed in the 1960s and 1970s by a group of AT&T employees at Bell Labs including Ken Thompson, Dennis Ritchie and Douglas McIlroy. ... Diagram of the relationships between several Unix-like systems A Unix-like operating system is one that behaves in a manner similar to a Unix system, while not necessarily conforming to or being certified to any version of the Single UNIX Specification. ... Linux (IPA pronunciation: ) is a Unix-like computer operating system family that uses the Linux kernel. ... BSD redirects here; for other uses see BSD (disambiguation). ... Solaris is a computer operating system developed by Sun Microsystems. ... Mac OS X (official IPA pronunciation: ) is a line of proprietary, graphical operating systems developed, marketed, and sold by Apple Inc. ... Microsoft Windows is the name of several families of proprietary software operating systems by Microsoft. ... BeOS is an operating system for personal computers which began development by Be Inc. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... processing Autoconf is a tool for producing shell scripts that automatically configure software source code packages to adapt to many kinds of UNIX-like systems. ... Automake is a programming tool that produces portable makefiles for use by the make program, used in compiling software. ... Visual C++ 6. ... Watcom International Corporation was founded in 1981 from the research of the Computer Systems Group at the University of Waterloo, in Waterloo, Ontario, Canada. ... Project Builder is an integrated development environment (IDE) developed by NeXT computer, which was acquired and distributed Apple Computer for software development on Mac OS X computer systems prior to Mac OS X 10. ...

API Organization

libFLAC API is organized into streams, seekable streams and files in the order of increasing abstraction from the base FLAC bitstream. Most FLAC applications will generally restrict themselves to encoding/decoding using libFLAC at the file level interface.

Encoder

FLAC encoder is created as follows

1. Create an instance of the encoder using FLAC__file_encoder_new()
2. Set various parameters of this encoder like SamplingRate, BitsPerSample, NumberofChannels, LPC order, Mid-Side stereo, Rice parameter search distance, min & max residual, BlockSize, output FileName (if no output file, use stream encoder). Function calls for each of these
3. Initialize the FLAC encoder using FLAC__file_encoder_init()
4. Encode the raw samples using FLAC__file_encoder_process() or FLAC__file_encoder_process_interleaver() functions for each samples read from input (either ADC or File).
5. On finishing encoding process call FLAC__file_encoder_finish(), after which you can either destroy the encoder or redo the steps for another file following steps 1-5.

Software support

Encoding

• Windows
  • Easy Media Creator
  • Easy CD-DA Extractor
  • Nero Burning ROM with optional external filter plug-in
  • dBpoweramp Music Converter with official codec
  • MediaMonkey
  • Winamp native FLAC support now included
  • JetAudio
  • foobar2000 with official external encoder
  • MP3 Stream Editor with official external encoder
  • Burrrn
  • Flac Frontend

• Mac OS X
  • Toast Titanium, beginning with version 7
  • xACT, the X Audio Compression Toolkit, not to be mixed-up with Microsoft's XACT audio programming library

• Linux
  • GNOME
    • GnomeBaker
    • Serpentine
  • KDE
    • K3b

The word encoding has a number of meanings. ... Microsoft Windows is the name of several families of proprietary software operating systems by Microsoft. ... Easy Media Creator is optical disc authoring software, produced by Roxio. ... This article or section contains information that has not been verified and thus might not be reliable. ... Nero Burning ROM is a popular optical disc authoring program for Microsoft Windows and Linux by Nero AG, formerly Ahead Software. ... dBpowerAMP is a collection of fully-integrated audio software from Illustrate, written by Spoon. ... MediaMonkey (no connection with Monkeys Audio, the lossless audio codec), made by Ventis Media Inc, is an audio player that also functions as a media library. ... Winamp is a multimedia player made by Nullsoft. ... JetAudio is a company established in September 2000. ... foobar2000 is a freeware audio player for Windows developed by Peter Pawlowski, a former freelance contractor for Nullsoft. ... Mac OS X (official IPA pronunciation: ) is a line of proprietary, graphical operating systems developed, marketed, and sold by Apple Inc. ... Toast is a CD and DVD authoring and media conversion software application for Mac OS X. External links Roxio Toast Category: ... Linux (IPA pronunciation: ) is a Unix-like computer operating system family that uses the Linux kernel. ... The GNOME project is an international effort to create an easy-to-use computing platform built entirely from free software. ... GnomeBaker is a CD/DVD burning application for GNU/Linux and other Unix-like operating systems designed for GNOME. External links GnomeBaker homepage ... Serpentine is a GNOME-based audio CD authorizing application. ... For the stock ticker symbol, see 4Kids Entertainment. ... K3b is a free software CD and DVD authoring application for GNU/Linux and other Unix-like operating systems designed for KDE. It provides a graphical user interface to perform most CD/DVD burning tasks like creating an Audio CD from a set of audio files or copying a CD...

Decoding

• Cross Platform
  • VLC media player
  • MPlayer
  • Songbird
  • Squeezebox
• Mac OS X
  • Cog
• Windows
  • iTunes after installing codec from Xiph
  • Windows Media Player and Media Player Classic with third-party plugin
  • Winamp
  • JetAudio
  • foobar2000
  • Quintessential Player with flac plugin
  • KSP Sound Player plugin included with normal install
  • MediaMonkey
  • MP3 Stream Editor plugin included with normal install
  • Cockos REAPER Multitrack Recorder and Editor
  • Renoise supports import and export from version 1.8
  • The KMPlayer
  • ALTools-based ALSong
  • XMPlay

• Linux
  • Audacious
  • Banshee (music player)
  • Baudline
  • Cmus
  • mpd
  • ogg123 (if compiled against flac - ogg123 is part of the 'vorbis-tools' package)
  • Xine
  • GNOME
    • Rhythmbox
    • XMMS with xmms-flac plugin
  • KDE
    • Amarok

For other senses of the word code, see code (disambiguation). ... The VLC media player is a free software media player, distributed under the GNU General Public License. ... This article is about the open source media player. ... Songbird is a free media player that is currently in early development. ... The Squeezebox is a hardware device from Slim Devices. ... Cog is a free software audio player for Mac OS X. It has a single-paned, playlist interface and supports multiple formats and their metadata that are otherwise unsupported on OS X. Features Audio formats AAC AIFF FLAC Monkeys Audio MP3 Musepack Ogg Vorbis Shorten Wavpack WAV Metadata formats... The correct title of this article is . ... The Xiph. ... Windows Media Player (WMP) is a digital media player and media library application developed by Microsoft that is used for playing audio, video and images on personal computers running the Microsoft Windows operating system, as well as on Pocket PC and Windows Mobile-based devices. ... Media Player Classic (MPC) is a compact free software media player for Microsoft Windows. ... Third party is a term used in several contexts, including: Third party (politics) Third-party manufacturers: See aftermarket. ... Winamp is a multimedia player made by Nullsoft. ... JetAudio is a company established in September 2000. ... foobar2000 is a freeware audio player for Windows developed by Peter Pawlowski, a former freelance contractor for Nullsoft. ... Quintessential Player version 4. ... KSP (KSP Sound Player or Kalliope Sound Player) is a free audio player for Windows which is developed and distributed by Kalliope s. ... MediaMonkey (no connection with Monkeys Audio, the lossless audio codec), made by Ventis Media Inc, is an audio player that also functions as a media library. ... The reaper was a horse-drawn farm implement invented in 1831 and patented by Cyrus McCormick in 1834 to cut small grain crops. ... Renoise is a contemporary software package based upon the heritage and development of tracker software. ... The KMPlayer (not to be confused with KMPlayer) is a video and audio player for Windows which can play a large number of formats such as VCD, DVD, AVI, MPEG-1/2/4, WMV, RealMedia, and QuickTime among others. ... ALSong is a live lyrics MP3 player from ESTsoft for the Microsoft Windows platform, and is the eighth in the ALTools line of free PC utilities. ... XMPlay is a freeware audio player for Windows, supporting the OGG / MP3 / MP2 / MP1 / WMA / WAV / CDA / MO3 / IT / XM / S3M / MTM / MOD / UMX audio formats, and PLS / M3U / ASX playlists. ... Audacious is a free software media player for POSIX standards compliant based systems. ... Banshee is an audio player for Linux operating systems, that uses Mono and Gtk#. It also uses the Helix and GStreamer multimedia platforms to play, encode, and decode Ogg Vorbis, MP3, FLAC, and other formats. ... The baudline time-frequency broswer is a signals analysis tool designed for scientific visualization. ... Cmus in the Tree view Cmus in the List view Cmus in the File Browser view Cmus in the Filter view Cmus in the Queue view Cmus in the Playlist view Cmus (C* Music Player) is a small and fast console audio player for Unix-like operating systems. ... Music Player Daemon (MPD) is a music player which allows for remote access from another computer. ... In computing, Ogg123 is a command line audioplayer for Unix and Linux that plays Ogg Vorbis, Ogg Speex and FLAC codecs. ... The correct title of this article is . ... Rhythmbox is an audio player that plays and helps organize digital music. ... XMMSs default appearance The X Multimedia System (XMMS) is a free audio player very similar to Winamp, that runs on many Unix-like operating systems. ... Amarok (formerly known as amaroK) is a free software music player for GNU/Linux and other varieties of Unix. ...

Ripping

• Windows
  • BonkEnc using the FLAC.dll API
  • CDex using the external encoder option (now lists "flac.dll" as an encoder option if flac is installed)
  • Exact Audio Copy using the external encoder
  • foobar2000 using the Converter plugin and the external encoder
  • MediaMonkey
  • MP3 Stream Editor using the official external encoder (single mode/album mode/full cover picture support)
  • Winamp
  • PlexTools

• Mac OS X
  • Max — 10.4 only

• Linux
  • ABCDE
  • Banshee (music player)
  • Cdda2wav
  • Cdparanoia
  • Mencoder
  • GNOME
    • Grip
    • RipOff
    • Sound Juicer
  • KDE
    • KAudioCreator
    • Konqueror

Ripping is the process of copying the audio or video data from one media form, such as Digital Versatile Disc (DVD) or Compact Disc (CD), to a hard disk. ... BonkEnc is an Open Source CD audio extractor for Microsoft Windows. ... CDex is a CD audio extractor/converter program for Microsoft Windows written by Albert L. Faber. ... Exact Audio Copy, or often simply EAC, is a proprietary freeware, for non-commercial use, CD ripping program for Microsoft Windows. ... foobar2000 is a freeware audio player for Windows developed by Peter Pawlowski, a former freelance contractor for Nullsoft. ... MediaMonkey (no connection with Monkeys Audio, the lossless audio codec), made by Ventis Media Inc, is an audio player that also functions as a media library. ... Winamp is a multimedia player made by Nullsoft. ... The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ... Mac OS X version 10. ... ABCDE is a CD ripper for Linux, operated entirely from the command line. ... Banshee is an audio player for Linux operating systems, that uses Mono and Gtk#. It also uses the Helix and GStreamer multimedia platforms to play, encode, and decode Ogg Vorbis, MP3, FLAC, and other formats. ... cdparanoia is a compact disc ripper for Linux and BeOS. It was designed to be a minimalistic, high-quality CD ripper that would be able to compensate for and adjust to poor hardware to produce a flawless rip. ... MEncoder is a command line video encoding tool released under the GNU General Public License. ... Grip is a cd player and cd-ripping program within the GNOME project. ... Sound Juicer is a CD ripping tool. ... Konqueror is a file manager, web browser and file viewer, which was developed as part of the K Desktop Environment (KDE) by volunteers and runs on most Unix-like operating systems. ...

Hardware support

• iPod - Video, Nano, Photo, Colour, Mini (2nd generation), using third party Rockbox firmware
• Nearly all Rockbox-compatible DAPs, including the iRiver and Gigabeat (Toshiba) range of devices, plus the aforementioned iPods
• Hermstedt Hifidelio
• iAudio (Cowon) - A2 (natively, from firmware v1.59), 6, M3, M5, X5, U3, also via Rockbox firmware
• Olive media servers (Symphony, Musica, Opus)
• Rio Karma
• Squeezebox network music player (v1 recodes to PCM on the server side, v2 and up decode natively on the Squeezebox)
• Sonos
• Meizu M6 Miniplayer
• Pixel Magic Systems' HD Mediabox (with firmware 1.3.4 or higher)
• Embedded Waveplayer- Module with FLAC level 0-2 support, MIDI and serial interface
• Teclast T29
• Trekstor Vibez

The current iPod line. ... Rockbox is a free software replacement firmware for digital audio players (DAPs). ... Rockbox is a free software replacement firmware for digital audio players (DAPs). ... Current iriver logo iriver (formerly iRiver) Co. ... . The initial letter is shown capitalized due to technical restrictions. ... Toshiba Corporations headquarters in Hamamatsucho, Tokyo Toshiba Corporation sales by division for year ending March, 31 2005 Toshiba Corporation ) (TYO: 6502 ) is a Japanese high technology electrical and electronics manufacturing firm, headquartered in Tokyo, Japan. ... The iAudio logo iAudio is a brand of portable digital audio player produced by Cowon. ... Cowons company logo Cowon Systems, Inc. ... Rockbox is a free software replacement firmware for digital audio players (DAPs). ... The Karma is a digital audio player made by Rio. ... The Squeezebox is a hardware device from Slim Devices. ... Pulse-code modulation (PCM) is a digital representation of an analog signal where the magnitude of the signal is sampled regularly at uniform intervals, then quantized to a series of symbols in a digital (usually binary) code. ... Wikipedia does not have an article with this exact name. ... The Trekstor Vibez is a Digital Audio Player due to be released in November 2006. ...

See also

Free software Portal

• SHN
• TTA
• WavPack
• Meridian Lossless Packing
• Monkey's Audio

Image File history File links Floss_draft. ... SHN (Shorten) is a file format used to losslessly compress CD-quality audio files (44. ... True Audio (abbreviated TTA) is a free, simple real-time lossless audio codec, based on adaptive prognostic filters which has shown satisfactory results comparing to majority of modern analogs. ... WavPack is a free, open source lossless audio compression format developed by David Bryant. ... Meridian Lossless Packing is a proprietary lossless compression technique for compressing PCM audio data. ... Monkey’s Audio is a lossless audio compression codec. ...

External links

• FLAC Project homepage
• FLAC – Hydrogenaudio Knowledgebase
• Comparison of FLAC and other lossless audio codecs
• Comparison of lossless formats by Hans Heiden
• etree.org wiki page about FLAC
• List of resources on lossless audio coding
• Lossless audio formats, a look at the speed and compression strength of FLAC and five other lossless formats.
• The Lossless Audio Blog Lossless Audio News & Information Site.
• FLAC.ORG FLAC informational and resources web site

This article is part of WikiProject Free Software, an effort to create, expand, organize, and improve free software-related articles.

Free software Portal