5 encoders and an XY pad is not a lot to work with, but it should be enough for a basic control setup. Assuming you have zero access to the front panel of your synth (or it has no realtime controls of its own) then what are your go-to controls on a synth? Let’s also say you are working with a preset that is already what you want in general but if you were playing live you might want a few specific controls at your fingertips…
This is the basic idea I came up with but I am still in the process of deciding these things.
Cutoff = Y
Resonance = X
Filter Env Amt
Thinking about this made me wonder how others handle it. Suggestions welcome of course.