eval notes_off logic on every frame tick

[robbiecloset]

See original comment on Lines here.

My understanding of the note & midi code is that we would want to evaluate whether or not a note should be "turned off" every tick, as opposed to when a midi OP is banged. Without this change, we effectively never send a note off message to midi, and the length parameter doesn't do anything.

With this change length is respected and the note off message is sent to midi after the appropriate number of frames have passed.

[robbiecloset]

Sorry that some of my vim config cleaned up some whitespace, etc, automatically.