Sample AAC File Download

AAC (Advanced Audio Coding) was designed as MP3's successor, achieving noticeably better audio quality at the same bitrate through more efficient compression. It's the format behind Apple's iTunes/Apple Music downloads and YouTube's audio streams, among others.

The efficiency gain comes from better modeling of how human hearing works — AAC can discard more inaudible data than MP3's older compression model without a perceptible quality drop, which is why a 128kbps AAC file often sounds closer to a 192kbps MP3 than you'd expect from the bitrate alone.

Grab the sample below to test playback or transcoding support for AAC specifically, since not every audio library treats it as a first-class citizen the way it does MP3.