I am baffled.

I am trying to use Realband as a sort of scratchpad arranger with midi. I set track 1 to be a flute and track 2 to be a jazz guitar. After entering a dozen or so bars, I gave it a listen. To my surprise I either get both tracks playing flute, or both tracks playing guitar. If I change one instrument, realband plays both parts with the latest instrument chosen.

I am using my M-Audio Pro as a MIDI out to a Ketron SD2. But the problem remains if I switch to my native sound card and a vst synth.

If I load an older song, everything plays normally, so there must be a setting in this song that is causing the problem.

What the heck is going on?

Thanks

John