Editing Rockbox (section)

=== Codecs ===

Rockbox on software decoding platforms (non-Archos) supports playback of twelve [[lossy compression|lossy]] codecs (depending on how one counts), five [[lossless data compression|lossless]], two uncompressed and twelve miscellaneous formats.<ref>{{cite web|title=Rockbox Supported audio formats|url=http://download.rockbox.org/daily/manual/rockbox-sansaclipplus/rockbox-buildap2.html#x17-335000B.1|work=Rockbox Manual}}</ref> This makes a conservative total of 30 supported audio formats, although a few of them do not operate in realtime on all platforms. Extensive work has gone into optimizing each codec, with FLAC, Ogg Vorbis, WMA, APE, TTA, MPC, Wavpack, ATRAC3, Cook and WMA Pro among the fastest known integer implementations for those formats.<ref>{{cite web|url=http://www.hydrogenaud.io/forums/index.php?showtopic=82125&view=findpost&p=716976 |title=Codec performance comparison – Hydrogenaudio Forums |publisher=Hydrogenaudio |access-date=March 12, 2011}}</ref>

==== Lossy formats ====
* MPEG audio layers I-III (MP3/[[MPEG-1 Audio Layer II|MP2]]/[[MPEG-1 Audio Layer I|MP1]])
* [[Vorbis|Ogg Vorbis]]
* [[Advanced Audio Coding|MPEG-4 AAC]](-LC/HE/HEv2 profiles) (in [[MPEG-4 Part 14|MP4]] or [[RealMedia|RM]] containers)
* [[Musepack]]
* [[Dolby Digital|AC3]] (raw or [[RealMedia|RM]] container)
* [[Windows Media Audio|WMA Standard]]
* [[Windows Media Audio|WMA Professional]]
* [[Speex]]
* [[Cook Codec|Cook]]
* [[Adaptive Transform Acoustic Coding#ATRAC3 (LP2 and LP4 Modes)|ATRAC3]]
* The lossy portion of [[WavPack]] hybrid files
* [[Opus (audio format)|Opus]]

==== Lossless formats ====
* [[Free Lossless Audio Codec|FLAC]]
* [[Apple Lossless Audio Codec|ALAC]]
* [[WavPack]]
* [[Shorten (file format)|Shorten]]
* [[Monkey's Audio]]
* TTA

==== Uncompressed formats ====
* [[WAV]]
* [[Audio Interchange File Format|AIFF]]
Together they include over a dozen different [[Pulse-code modulation|PCM]] and [[Adaptive DPCM|ADPCM]] formats.

==== Miscellaneous formats ====

In addition, there are playback of game audio types [[ADX (file format)|ADX]], [[MOS Technology SID|SID]], [[NES Sound Format|NSF]], [[Atari SAP music format|SAP]], [[SPC700 sound format|SPC]], AY, [[Game Boy Sound System|GBS]], [[Hudson Entertainment System Sound Format|HES]], KSS, SGC, [[VGM (file format)|VGM]], and [[VGM (file format)|VGZ]]. The [[MOD (file format)|MOD]] [[tracker (music software)|tracker]] format, and the Yamaha [[Synthetic Music Mobile Application Format|SMAF]] are also now supported.<ref>{{cite web|title=Other Codecs|url=http://download.rockbox.org/daily/manual/rockbox-sansaclipplus/rockbox-buildap2.html#x17-338000B.1.3|work=Rockbox Manual|access-date=May 22, 2011}}</ref>

Some profiles in Monkey's Audio are not real time on all targets due to very high CPU needs. Also, Rockbox will not play files with a [[digital rights management]] (DRM) scheme.