Yes I can see it now. Good job getting this done and to us. grin It was not what I expected, but may have been what you been trying to explain all along. A picture is worth a 1000 words. I had already concluded I would not be able to help you, and this video does not change my conclusion. That is some messed up stuff going on with BIAB and your piano. cry BIAB is simply falling apart as it tries to play the chord backing. I have never heard that from the box. Hopefully, Andrew has some idea.

BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, 1TB WD Black NVMe SSD, 2TB WDC Blue SSD, 1TB WD Blue, 2 TB SK NVMe, 6 TB External, Motu Audio Express 6x6