Short for Advanced Audio Coding, AAC is a lossy audio compression standard. Based on MPEG-2 and MERG-4 specifications, AAC was developed by AT&T, Dolby Labs, Sony, Nokia and Fraunhofer IIS with certain improvement with the intent of replacing MP3. In 1997, AAC was standardized by the Moving Picture Experts Group. it is true that AAC is a comprehensive audio coding standard. For one thing, AAC's multichannel and high sampling frequency make it perfect for DVD-Audio. For another, high quality sound with low bitrate makes AAC more acceptable for use in mobile communications, network telephone or online radio. Nowadays, more and more devices and applications are embracing AAC.
Related Article: How to Rip Blu-ray Sound Track to AAC File
Compare AAC with MP3 in Specifications
Supported Devices or Multimedia:
YouTube, iOS ( iPhone, iPod, iPad, iTunes), most of the Nokia devices, BlackBerry, PlayStation Vita, Sony Walkman MP3 series, Samsung YEPP, in-dash car audio systems and many other Android devices.