Digital Compact Cassette was intended as a digital replacement for the mass-market analog cassette tape, but received very little attention or adaptation. Its failure is generally attributed to higher production costs than audio CDs, durability and lukewarm reception by consumers.
The ADAT system uses Super VHS tapes to record 8 synchronized digital audiotracks at once.
There have also been several audio recording systems which used VHSvideo recorders as storage devices and video tape transports, generally by encoding the digital data to be recorded into an analog composite video signal (which resembles static) and then recording this to magnetic tape. These systems were generally used as "mixdown" recorders, to record the finished mix from a multi-track recorder in preparation for the manufacture of a vinyl record, cassette tape, or CD. An example was the Dbx Model 700.[1] Another example is the Sony PCM adaptor series.
Several companies sold VHS backup solutions in the 80s and 90s where data was converted to a video image which was then saved on a VHS tape.