Hi Peter, I tried your 'Set-up' on my KN7000 but could not reproduce the fault which you have observed. However, I do notice that if all the ACP parts have their volumes set to 105 and the APC slider is at maximum, then some of the organ voices in the Right hand, do tend to get a bit 'drowned' - particularly, the great 'Jazz Organ Soloist'. If you reduce the APC volume this should improve the balance.
Another thing I have done, is to increase the Jazz Organ Soloist Volume in the editor and store it in the Sound memory. This provides much more flexibility in balancing the sounds and gives the voice a bit more punch.

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Willum