Finally started using MODEP. Nice! Really nice. It wasn’t my primary reason for getting a pisound HAT, but it may well become my primary use, at least during jams.
Also got a bit into Max 7, recently, decades after dabbling in early (MIDI-only) versions of the visual programming language. Unlike Pure data, it’s commercial. But the annual license fees for academics is relatively reasonable (60USD).
Noticed that Max could be used to create plugins for the MOD Duo. Haven’t made it work, but it’s very intriguing, to me. Maybe it can’t work on the Pi, for whatever reason (as the low-level C++ code might be specific to the MOD Duo). But it’s still pretty interesting.
It expects the MOD Duo to be plugged in through USB and it sends it a few C++ files. Didn’t go deeply into the documentation, but the script to compile the C++ code failed on both macOS and Raspbian Lite. Again, it’s completely possible that the code produced isn’t usable on the Pi. But it’d be quite neat if it did work.
Otherwise, might try creating simple plugins myself. Not sure where to start but the Zynthian plugins (posted in this forum by @tomerb (whose name is eerily reminiscent of that of a legend in the plugin world)) might be a good start.