@Andreas8420 said:
Hi! Could it be that your master keyboard (when used with USB connectivity) can utilize multiple key range zones? Meaning, that those could happen to overlap, and then the flange sound you are hearing is actually phasing of those overlapping notes?
That was the problem, and tweaking those settings on the StudioLogic keyboard fixed it, thanks!
For anyone who stumbles upon this thread and is wondering what the fix is, you only want one of these four preset blocks enabled. I had all four selected, which was sending out overlapping signals. I had to toggle the cursor onto #2, 3, and 4 and press down on the selection knob to disable them.