It wasn't converted into a midi bass, it was purchased as a midi bass and used that way by Greg Lake on the Black Moon tour. There's a load of footage from the Live at the Royal Albert Hall DVD show. He used it to trigger midi modules as well as just as a bass. Dr Rob Burns (a well known name in the Wal world from the 80s) did the programming of all the synths and the MB4 module for him.
It certainly did... clearly someone realised the scope for a celebrity fast buck to be made...
Very boring and lame songs compared to the old ELP stuff....



