The rythm and beats update

The rythm and beats update could be a verry tiny update wich could add more music discs (like a sweden disk for exemple) or more instruments for note blocks (like: electric guitar on netherrack or anything you want really) but also add more musics and sound effects to the game. But it could also add a new structure : the maestro opera wich could be filled with note blocks and have some hidden music discs inside them  and also a new mob within this structure :The Maestro who would attack by throwing music discs at you or distcract other mobs by playing some music with his violin (wich could be dropped by like 10% chance) and the violin of the maestro have the power to distract hostile mobs and make them stop for 10/15 seconds to leave you some time to escape (sorry for my bad english).