Well, I’ve had a few problems with this one.
A few timing issues which I can fix in software, the biggest problem has been the display. The DLR1414 is incredibly noisy.
So noisy you can here a high pitched whine over the sound you’re playing and also it puts so much noise on the ADC lines that reading pot values is almost impossible. If I blank the display in software, everything suddenly gets quiet and stable.
Not one to give up without a fight, I’ve redone the PCBs using 7 segment displays as they’re much quieter than the DLR1414. I’ve just re-ordered them, I’ll post pictures when the new board is assembled, and once I’ve got the basics running I’ll record a demo video. In the meantime I’ll continue working on the software (which will be the same not counting the display portion).