Sean do you have a pcb photo of Tactix? I'd like to know if the on/off button is on the button matrix, and the yellow buttons connection to port A.
Is the tuning cap knob external?(accessible by the end-user) If internal, and assuming you didn't touch the tuning capacitor, can you measure the frequency of the R/C circuit? I couldn't find any vid on Youtube to use as reference for soundpitch. For now, I'm just assuming 400khz.