[theoperagoer]

This is so cool. I'm a huge classical music fan.

I wish you could distinguish between "right" and "left" hand keypresses to control each line separately

[david927]

yes! This was my request as well.

And maybe a "learn" mode where you can see the original timing or the timing of a famous interpretation, like ghosts in video games.

Love it! Thanks so much for doing this.