By the way, the Default Startup Performance is a great way to set up your BK exactly as you tend to use it, split points, chord recognition types, Assign Switches, D-Beam settings, pedal assignments , and (specifically en point to this thread) Part Volumes and the like.
Now, turn on your BK and you’re ready to go! Swap ROM or user styles in and out and everything should sound great as long as you balance the User styles (if they need it) with the Makeup Tools…
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An arranger is just a tool. What matters is what you build with it..!