Plays 8-bit PCM audio on pin D3 using pulse-width modulation (PWM) on Arduino with Atmega4809. This code is not fully tested.
Copy the folder NanoEvery-PCM with the source files to your Arduino Library path. Its in your sketchbook/libraries folder which defaults to:
~/Arduino/libraries(linux)~/Documents/Arduino/libraries(osx)C:\Users\<User Name>\Documents\Arduino\libraries(windows)