Just a few quick bug-fixes & quality of life changes (replaced original upload):
- Emission now working properly on chord buttons (Unity builds evidently don't register changes to "_Emission" tags unless they are enabled on a material at loadtime). Just replaced Disable/Enable keyword with a separate emission material to fix that.
- When turning off a chord via the chord button, a user can hover over a pitch (or two) within the chord to sustain it/them beyond the shut-off point.
- Commented out all Debug.Log lines for slightly better performance.