There have been many events at Radio City broadcast on television, including every single Tony Awards telecast since 200(3?). Only this and last year have problems with the sound occurred (with the exception of possibly one or two tiny instances I may not be remembering).
I would LOVE an explanation of what the issues are. Apparently everyone in-house can hear fine and don't notice anything (not difficult in that large venue. You can whisper and it would echo everywhere!).
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle