Do you have a specific question? We can't provide much quality input if we don't know what kind of input you want from us.

Why did you post this twice on two seperate accounts?

I play instruments. Something that would help would be an app to navigate songs by bars. At the moment I learn songs by rewinding Youtube recordings which means that I'm moving to far back most of the time, and I lose my place. It would be great to focus on the bars I'm learning.

I'm a bass player and for the longest time I didn't think I could ever play pit orchestra for theatre because I couldn't see the musical director. Most of the time it's not an issue except when there is conducting that I absolutely have to be aware of. We solved it in the first place by clipping a lavalier radio mic onto the MD's cuff that goes into my monitoring so that I could hear the movement. Sometimes that means the MD has to modify the way he or she conducts so that I can be properly aware but I have not had a problem with anyone. The only issue is if they're not wearing long sleeves which is sort of hilarious. It works for vamps and cold ins, the rest of the time I'm just playing along. On many shows you're now playing to click anyway.

The main problem is just that I can't read music, and even if I could read braille music (which I can't) I kinda need both hands on the instrument, so I just have to learn the whole show by memory. This does cost me work and money because there are plenty of shows where the lead guitar part is basically impossible to learn like that, which is why I almost exclusively play bass.

This sounds cool.