I'm working on creating a musical synthesizer and the sound engine requires a Raspberry Pi 4 + PiSound. From what I can gather, the PiSound is placed right on top of the RPI4 and uses its GPIO pins.

What I'm building requires 96 pins. How would I be able to expand the quantity of available pins on my Pi4 whilst also being able to continue making use of the PiSound?


  • 1
    Possibly MCP23017 port expander chips.
    – CoderMike
    Commented Aug 28, 2023 at 21:46


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