Sony MDR-V500 Professional Headphones "fix yamaha" Questions

...Yamaha. There should have been a software program, called a mid map editor (MME), that came with your keyboard. If you are unfamiliar with this, it is used for changing the values that are sent ...

...Yamaha keyboard. A few days ago I had them on my head and just flipped the right earpad and then.... no more sound from that side. But sound comes from the left side O.K. I want to fix these ...