DVD-Audio (commonly abbreviated as DVD-A) is a digital format for delivering high-fidelity audio content on a DVD. DVD-Audio is not intended to be a video delivery format and is not the same as video DVDs containing concert films or music videos.
The first discs entered the marketplace in 2000. DVD-Audio was in a format war with Super Audio CD (SACD), another format for delivering high-fidelity audio content.
Read more about DVD-Audio: Audio Specifications, Player Compatibility, Preamplifier/Surround Processor Interface, Sound Quality, Copy Protection, DVD-Audio Authoring Software