Hi,
I built two identical controller keyboards using CORE_STM32F4 running MIDIbox NG. They currently feature analog ins, two wheels and octave up/down buttons. It was very hard and time consuming to build these without a proper workshop (used mainly beech wood and aluminium).
Issues:
#1 One big problem i have is that the velocity resolution is very low. It looks like just 5-10 values are generated, nothing in between. It's too coarse for playing properly.
#2 Another problem is that i get random pitch wheel values when in zero position. I wonder if there is kind of a plateau range around the zero position to mitigate that. Or maybe it's because of a faulty pot?
Thanks for your help