Well, there are issues I need to address, but I've managed to get limited functionality at least. I will have to take another look at the keyboard matrix hardware, and also check my row scanning. Could be just too long wires between keyboard and Teensy, because the functionality of individual keys is erratic. Also I can't get the chord selection to work properly, but that might be a related issue. Maybe I'll just put together another keyboard. The one I'm using now is based on a discarded mechanical keyboard prototype I made. I don't trust it. Anyway, I made a teaser video for you.