You could write C1 at the top

. C9 at the bottom? Possibly the corresponding cycle next to each the C1,C2,etc.
Your plug in idea has given me another idea. Here's an idea that will make you RICH! Well... we'll see.
Say you have a vocal tuner that can track pitch and export a midi file. Then import the midi file into Pipelines nicEQ. The pitches detected on the midi will trigger your eq to add the desired gain to that midi pitch as the clip plays. You can also decide how much to eq the frequencies that aren't effected by the midi pitches. You following?
Don't know exactly how this would sound, if it would be musical or not. It might help a vocal cut through the mix more because it's not taking up as much space and cluttering (if you were to subtractive eq where you didn't need). I dont know alright, just brainstorming! I suppose this can be done with your plug if you took it note by note and edited, maybe that way you could try it out.
Either way, I'm gonna try your plug. It's interesting. Never been done before? I admire the ambition..
Eric