HI

Hmm well from the examples you have sent including the one I mentioned earlier.
That is stuck notes E5 B4 and G4 as Andrew has found.
It might just pay to make a test recording playing these notes one at a time instead of a handful.

You could have a key contact problem in the octave 4 and 5 part of the key bed
Or may be as I said some sort of congestion, due to lack of polyphony.
What is your spec polyphony wise?
A very interesting project, this one!!
Mike


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