FLAC
From SqueezeboxWiki
FLAC is a Free Lossless Audio Codec developed by Josh Coalson.
It supports a very free form Vorbis comment system for metadata and embedded CueSheets.
It is open source and free of patents.
See the TechnicalGuideToFLAC
External links
Media formats (codec comparison)
AAC -
AAC+ -
Apple Lossless -
CD -
DVD -
FLAC -
M3U -
MP3 -
Ogg Vorbis -
WAV -
WMA