Originellement posté par DC Ron
This is likely of no help whatsoever, but this happened to me once when I left Jam Origin's MIDI Guitar standalone active. No matter what BiaB played, there was a MIDI piano following along. Drove me NUTS for a few minutes. Hope your issue is something simple, too.

Thanks for the idea, DC Ron.

But I don't think it applies to me:
- For MIDI, I'm not using a virtual instrument, but an external hardware sound generator, in this case my Clavinova CVP 307, via a digital audio interface.
- In the mixer window, I can see that there's no instrument plugin attached to the Realtrack in question.

Do you think I should check anything else?

Best

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Lazy Bird