AAC
AAC is a file format for storing music or other sounds. It stands for Advanced Audio Coding or Advanced Audio Codec. It is used by Apple Inc. in the iPod and iTunes, by Sony in the Walkman, in all Android devices, in car stereos, any by many other devices. AAC is one of the standard formats that comes from the MPEG organization, the same people who invented MP3. Like MP3, AAC is a compressed format. It works by removing parts of the music that people can not hear. A good AAC encoder can compress CD quality music to about 10% of its original size without affecting the perceived sound quality.