Music Box New install of Raspian Wiring Raspberry Pi: Inputs (expecting 3.3V): GPIO 17 GPIO 18 GPIO 27 GPIO 22 GPIO 23 GPIO 24 Speaker: Either 3.5mm jack or USB + 3.5mm jack Adafruit Audio Card. Install Adafruit Audio Card (if using USB sound card) https://learn.adafruit.com/usb-audio-cards-with-a-raspberry-pi/cm108-type