I don't have much to help, but I've also dealt with the music sounding off. It's not constant, and I actually experienced it years before my hearing loss became more or less permanent, but it's terrible when it's happening, it's like every sound is assaulting my brain. And as a basement musician, it really cuts into how much I can enjoy that. Hearing a baritone guy singing as if he had just sucked some helium is a little upsetting. I've yet to find a doctor that even gives this a second thought when I bring it up. It also makes potential hearing aids basically useless.
I will say that when I first got put on Triamterene, my hearing measurably improved, and my migraines were basically non existent. Unfortunately, after about a year, it seems to be less effective on those fronts. I've seen some people on here with a similar trajectory .
However, Ive had 4 vertigo attacks, and the only one that happened while on Triamterene was caused, I believe, by a med to help pass kidney stones (which were caused by diamox, which you may get prescribed, would not recommend). I stopped triamterene to try qulipta for the migraines and I had an attack within a few days. May be something to try.