I started working on live MIDI visualizations. At first inspired by old General MIDI visualizing software that takes in a .mid file and shows some old cgi band playing the song, but later inspired by a new Pobbles release. The first Pobbles video, seems to me like it must have used MIDI to create Pobbles, and finally shaders had a broader appeal to me. For a while I found it hard to sync up my visualizer, and I felt like shaders could sometimes be a very cool addition to a performance, but didn't really feel connected to the music.
MIDI fixes that!
I did a performance using my first MIDI visualizers, and the hope is a) get my visualizers to a point where they're super cool but an afterthought to my performances b) work with artists to add live midi visuals to their shows c) make music videos
Making a general Midi visualizer would be great for the PCoTandy GM competition - I probably wouldn't make unique visuals for every instrument, but maybe for categories. Eventually every one could be sweet!

1. Copy the code from this page
2. Decipher using this page
3. Make a switch statement to filter each MIDI channel to different functions
4. Do whatever you want for each channel, possibly use velocity and note values