You're very close to Aikin shape note heads! These help sight-read in any key, since they're always shaped according to whatever the relative major is, and so it's easy to learn the intervals between any two shapes.
You're very close to Aikin shape note heads! These help sight-read in any key, since they're always shaped according to whatever the relative major is, and so it's easy to learn the intervals between any two shapes.
Yeah this is basically shape notes with colors, in a MIDI format. Not helpful for non-digital musicians