AAC is a lossy audio compression standard, aimed to replace MP3. AAC was developed by a cooperation of AT&T Bell Labs, Fraunhofer IIS, Dolby Labs, Sony and Nokia. AAC became a standard with the MPEG-2 Part 7 standard and now a part of MPEG-4 specifications. AAC is common in a wide verity of devices:
Apple iProducts – iPhone, iPad, iPod, iTunes.
Gaming devices such as – Nintendo DSi, Playstation 3
Applications such as DivX Plus Web player.
Mobile Phones by Nokia and Sony, and Android Base devices.
AAC has several advantages over MP3 – higher quality for the same bitrate (by listening tests), Multiple Channels – Up to 48 (MP3 has a maximum of two), Higher Sample Frequency – 8 to 96kHz and more.
AAC – Wikipedia Entry – http://en.wikipedia.org/wiki/Advanced_Audio_Coding
AAC vs MP3 vs Lossless compression – http://www.co-bw.com/Audio_MP3_AAC_FLAC_CD.htm
