Rave was a demo group, based in finland under the leadership of Beast and Venom. The group eventually died following a conflict between the two leaders, so Venom took danish musicians Chronic and Cytron (12/92) with him and formed a new group called Extacy. This PROBABLY happened sometime around early 1993.
It's entirely possible that the group Rave where german coder Twice (later in Absolute!, then Lego) released his music editor SynTracker, is a different group altogether - at least ex-organizer Venom says this guy was never a member...
- Beast (main organizer)