FileInfo.com


.AAC File Extension


File Type Advanced Audio Coding File
File Format File
Common? No
File Description Compressed audio file similar to a .MP3 file, but offers several performance improvements; examples include a higher coding efficiency for both stationary and transient signals, a simpler filterbank, and better handling of frequencies above 16 kHz; maintains quality nearly indistinguishable from the original audio source.

AAC is the default encoding used by Apple iTunes software.
Program(s) that open aac files Mac: Apple iTunes; VideoLAN VLC media player; Roxio Toast; MPlayer
Windows: Apple iTunes; Media Player Classic; KSP Sound Player; VideoLAN VLC media player; Roxio Creator; MPlayer
Unix: VideoLAN VLC media player; MPlayer; XMMS with AAC plugin

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/aac