There is a very simple answer to the unwanted music problem. Invest a few quid in 'Noise Cancelling Headphones,' the best quality you can afford. They have their own batteries and you can either listen to your own music box, or get an adaptor so that they can be connected to most airline entertainment systems.
The benefits are twofold. Whilst listening to the music of your choice, the sound quality is far better and ambient noise is eliminated. In addition, you can withdraw the plug, leave the headphones on, and enjoy absolute silence.
As most of those complaining about the nuisance are frequent fliers, the expense is surely justified.