The Singing Pumpkin controller continues along. This new spin of the board corrects the previous flub-up of the reversed amplifier pin-out as well as adds USB and RS-485 to the mix. There are some minor errors on the board, but nothing that has prevented 90% of the board function from being validated. I need to check the recv direction on the USB, the Arduino-style reset pulse, and the RS-485 transceiver. With that I’ll be able to work on generalized firmware and PC software.