It's been so long since I've worked on this I went back over the schematic I drew up and of course I find an error after the fact, U2B's inputs need swapped.
I also put it into a simulator to try to "see" how it...
While I have yet to build the full product hopefully I can still answer your questions.
The P&G faders in question need increasing amounts of torque towards the top and bottom of its travel, this was an...
Simple answer, NXP has no accessible AGND on these chips so Teensy 4.x can’t have one. While the analog inputs aren’t as ‘good’ as prior models they should more than suffice for 7-bit MIDI with little to no issue.