Hi, I recently built a hardware synthesizer that runs SuperCollider on a Raspberry Pi Zero. When it boots it loads two programs: a Python script to manage the potentiometers and buttons and a SuperCollider script to handle sound generation. The two programs communicate with each other via Open Sound Control. I also incorporated an MCP3008 chip for analog to digital conversion and modified a low-cost USB soundcard by soldering a female audio output to it.
Feel free to check it out here and let me know your thoughts: https://www.youtube.com/watch?v=hTe0gYskTuY
Thanks!