Hi - thanks for help so far:

Opts - preferences; thru channel is 5. But how do I know what channel the keyboard is using?

OS = Vista Home Premium

MMM synth is MS Wavetable (seem to have 2 copies of this showing up in list of drivers). Can I disable one?

I do have Notation Composer also installed - never running at the same time - and this is operating normally on this machine (laptop). Sound on both this and BIAB work OK on my PC.