Part of the thinking which got me to back this campaign is the dream of a DIY version of the Critter & Guitari Organelle (a Pd-based hardware device which works as an instrument or FX box, etc.). The Organelle site has a good number of example patches which cover some pretty neat use cases. Also, there are some Automatonism modules to support the Organelle.
Like pisound, Organelle is meant to be used headless. It uses a small LCD screen, a few knobs, and a “keyboard” with little buttons.
There’s at least one person who’s built a Raspberry Pi setup which works directly with those Organelle patches. So, there probably isn’t any incompatibility with the board itself.
Wonder how difficult it’d be to reproduce the same functionality with pisound (the DIY project uses the stm32f0 board to interface with the actuators and sensors). Most likely, there wouldn’t be anything specific to the HAT, especially if some of the available GPIO ports are enough to make things work. But maybe somebody has insight about this?