DMCS
I've tried to do the same thing without much luck. Its really nice
that DMCS lets you play with internal voices but for serious work I go
with MIDI. If you do end up finding some that are really worth while let
me know. And if you want to use the Amiga to play _differnent_ sounds there
is a PD program in DL 15 called DRW (I think) that is very interesting and
I _think_ I've used some voices created by this in DMCS once as an
experiment.