I had to give this a try, and get audio working on the pico-mac.
github.com
This is for Pico 2, not tested on Pico 1.
Includes PWM or DAC based audio specify at build time.
Includes work on the submodule
https://github.com/retrotheory/umac updated for 464K support and patched audio addressing.

GitHub - retrotheory/pico-mac: Run the popular umac emulator right on your Pi Pico!
Run the popular umac emulator right on your Pi Pico! - retrotheory/pico-mac
This is for Pico 2, not tested on Pico 1.
Includes PWM or DAC based audio specify at build time.
Includes work on the submodule
https://github.com/retrotheory/umac updated for 464K support and patched audio addressing.

