Firmware for the Behringer Pro-1 ModSample modification for the Raspberry PI Pico.

The ModSample can add low-fi sample playing capability to the synthetizer, which can then be processed by the Pro-1 filter and amplifier and summed to the other two oscillators.

You can build your PCB from this Flux project.

Build project using cmake. This requires Raspberry Pi Pico C/C++ SDK to be installed.

git clone https://github.com/giulioz/pro1-modsample.git
mkdir build
cd build
cmake ..
make

Then copy modsample.uf2 to your Raspberry Pi Pico!

The PWM audio out is based off an example by Robin Grosset. Thanks!