and it should have no stepping.
I dont know if you can filter out the steps in code,
or if you need to apply a hi-pass, in hardware, afterwards to filter out the steps.
the -5/+15 is just polarity, and when the pot specifies that it goes from 1.8 to 36, that also means -1.8 to -36 right?
V+ = 10V to 36V (referenced to V-);V+ = +5V to +18V and V- = -5.0V to -18V (referenced to DGND -> ±5V to ±18V),
V+ voltage is dependent on V- voltage. The maximum delta voltage between V+ and V- is 36V. The digitallogic DGND potential can be anywhere between V+ and V-, the VL potential must be DGND and V+.
My logic is, that once you digitize a value, you should be able to convert that to midi with code
Then use a dac on the output side, via demultiplexing, only for the pure DC voltages,
and then use digital pots for the ac voltages?