Wait, yeah, how did they get the broadcast permissions for all of this
They'll just blame the singer's agency if anything happens, haha.
Smaller conventions never think about this even one bit (and generally it doesn't become a problem either)
Realistically, not worth the lawyer's 1h wage to do anything.
They only have audio control at the Master, don't they? Or is someone adjusting the master volume in Windows in real time?
It looked like they had a maybe 10 foot by 8 foot projection screen for the audience. Given their general setup approach, I imagine the in arena audio isn't great. So, stream might be a better experience, lol.
Jelly should stay in her natural range, her voice is much better there.