I agree with Frank concerning Bandstand.

Fran, As I think about what you are looking to do, I realize that SFZ ( the freeware version ) isn't a good choice, because I think it only allows for one channel of playback per instance.

I use Live synth pro to host the SGM180, and it works like a charm, but it is no longer in production. Perhaps Frank or someone else here has a better solution. If not, I can test some of the other apps I have and give you a report on how they work.

AJ