This is very cool! I was playing the with RP2040 and since I had a digital piano and a logic analyzer in front of me I decided to take a look at the midi signal

This is very cool! I was playing the with RP2040 and since I had a digital piano and a logic analyzer in front of me I decided to take a look at the midi signals. It took about 10 mins to reverse engineer them, make the RP2040 listen to them and make a little buzzer buzz the appropriate frequency using the signal from MIDI. (TLDR, MIDI is just a simple uart and transmits a key press/depress, what key and what velocity) Really cool that you took this to an actual proper synth!