Allow ability to create separate colors for individual note sections

[sreich]

See here https://www.youtube.com/watch?v=HiJ_D81QgJ8

I don't know how this is done technically, it isn't a matter of "take the lower notes and make them orange". Because you can bounce around, and it isn't based on major or minor from what I see in this video and others like antinpiano

Would this require manually specifying what the color is, for every single note? If this is the case, it might be best to say, allow export to csv of what notes there are in the stream with a default color. Then allow you to import it when playing/rendering it. So you can say "note 5 is RGB(red)", and so on. I'm sure MIDI doesn't allow you to embed that sort of information, so probably separate format is better.