Some really basic examples of audio processing code for the Expert Sleepers Disting eurorack module.
You can find the base repo for a blank audio passthrough project at https://github.com/expertsleepersltd/disting
You will need to have a 'PICKit 3' USB programmer and the MPLAB IDE (free Microchip dev tools) installed. I grabbed my PICKit from Mouser a while ago and it should be easy to find, wherever you are.
If you want to reflash the stock firmware, you can download that from Expert Sleepers here - http://www.expert-sleepers.co.uk/downloads/firmware/disting_firmware_1_0.zip
Note that the stock firmware is already compiled, so you'll just want to flash it using the 'mplab_ipe' tool.