Messed up music

Theres something wrong with the music in the original 2.10. I played the BS version and the original and the as the over world theme went some of the previous notes that were played in the song held out for a long time so the notes would end up clashing. I tried it with my quest, it did the same thing. I clicked to pause the game then returned and found it was alright, but every time I turn on Zelda classic and play a game the midi messes up like this. It's obviously a bug.