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Table of Contents
Raspberry Bit
a Raspberry Pi Zero board.
Schematic
change the PWM audio pins
https://www.raspberrypi.org/documentation/configuration/pin-configuration.md
https://www.raspberrypi.org/forums/viewtopic.php?f=91&t=86609
https://www.raspberrypi.org/forums/viewtopic.php?f=44&t=39138
Or like on https://othermod.com/raspberry-pi-zero-audio-circuit/
Open:
$ sudo nano /boot/config.txt
Add:
dtoverlay=pwm-2chan,pin=18,func=2,pin2=13,func2=4
Pure Data
PD WiringPi
https://sourceforge.net/projects/pdwiringpigpio/