Atributes could be like Bass, treble, performace...
Weapons could deal vibration damage/ with flesh penetration.
Some skills could be hypnotic like watching a snake being tamed

Support for allies in group earshot distances.
weapons could be from all sorts musical instruments to song book offhands.
I don't know much about music I've never played instrament or anything. It would be a funny idea to see sound destruction and hear sound coming from battle.
Maybe someone can pick up on this idea to improve and make more sense out of it.
