Mario Galaxy (PAL) Cutscene Audio Issue

[JMC47]

People have suggested it, but no one has implemented it. It'd be a bit unwieldy (at least in the current UI) to have a custom hotkey to flick every single setting. Maybe a bored dev will make a quick hack for you, but otherwise, I don't see the feature being implemented in the near future. Sorry I don't have a better answer.