I tried listening to my older tv's, but my tinnitis drowned out anything that I might have heard.

I have an ongoing tinnitis (comes of age), which is "apparently" at a lower frequency - maybe at 11K or so; it changes as my head moves. Should try and see if I could produce beats in my ears, but imagine that I cannot.

So, is a flyback transformer singing = music?

An interesting sidenote: my Radio Shack sound pressure meter was recognizing a spl of 75 dB or so at some higher frequencies, even though I heard nothing! Maybe I should point it at the back of my tv's.