The DSPG1 is a $20 IC--along with a handful of external parts this chip gives you a complete a 4 voice paraphonic audio synthesizer.

This PCB included for this project provides support circuitry for the DSPG1 including a MIDI type-A TRS input, a buffered mono audio output, and optocoupling between the MIDI stream and the DSPG1 IC.

The board is sized with a Eurorack SKIFF case in mind.

Power is +/- 12V; current consumption is less than 20mA per rail.

The components used are a mix of thru-hole and SMD1206. There is one SOIC sized op amp used.

I have laid out the board to make hand assembly of the SMD components relatively easy--SMD pads are large; spacing is adequate for hand assembly.

For more detail, please see the blog post here:

https://audiodiwhy.blogspot.com/2023/12/dsp-g1-arm-based-4-voice-synth-on-8-pin.html

When in stock the DSPG1 can be purchased direct from the manufacturer or Synthcube.

Please note: to make the DSPG1 produce audio output it needs to be fed MIDI continous controller data. I created a Native Instruments REAKTOR 5 ensemble to do this. Get the ensemble from the Github link below.