Appendix B. Audio and metadata formats
160
mance requirements.
B.1.2. Lossless Codecs
Format
Extension
Notes
Audio Interchange File Format
.aif
,
.aiff
Linear PCM 8/16/24/32 bit, IEEE
float 32/64 bit, ITU-T G.711 a-
law/
µ
-law, QuickTime IMA AD-
PCM
Monkey’s Audio
.ape
,
.mac
-c1000 to -c3000 files decode fast
enough to be useful.
Sun Audio
.au
,
.snd
Linear PCM 8/16/24/32 bit, IEEE
float 32/64 bit, ITU-T G.711 a-
law/
µ
-law
Free Lossless Audio
.flac
Supports multichannel playback in-
cluding downmixing to stereo.
Apple Lossless
.m4a
,
.mp4
Shorten
.shn
Seeking not supported.
True Audio
.tta
Wave64
.w64
Supports same formats as Wave-
form audio format.
Waveform audio format
.wav
Linear PCM 8/16/24/32 bit, IEEE
float 32/64 bit, ITU-T G.711 a-
law/
µ
-law, Microsoft ADPCM, In-
tel DVI ADPCM (IMA ADPCM)
2/3/4/5 bit, Dialogic OKI AD-
PCM, YAMAHA ADPCM, Adobe
SWF ADPCM
Wavpack
.wv
Note:
Free Lossless Audio multichannel tracks may not play in realtime on all devices
b
due to CPU performance requirements.
The Rockbox manual
(version rUnversioned directory-141216)
Iaudio M3