ADAT was 8 tracks of digital audio on a S-VHS. It was actually quite different from this because it was definitely targeted to home-studios, and it didn't use a

ADAT was 8 tracks of digital audio on a S-VHS. It was actually quite different from this because it was definitely targeted to home-studios, and it didn't use any video encoding, it was digital from end to end (and 15 years later).