Just keep it in mind. If you tried that sort of thing against- [Emery nearly names Merry Morgan specifically, but catches himself. They're in public!] -against someone more powerful, they'd just be able to cancel it out.

[Speaking of sirens they have to sidestep a particularly large one who's trotting down the market street.]

Not just sirens. There's all sorts of water fae groups that use music as a conduit for magic. Some sing, some use instruments, some do both.