alt Hacker News> I just stopped having to look down at the keyboard
Maybe the next step is an app for people who don't read sheet music; it would light up the keys on the keyboard that you need to press, when you look at it...?
Same for guitar, highlight where to put your fingers on a fret for each chord.
Various products have done this over the years. Forget app, actual keyboards and guitars that light up. It’s not a good way to learn.