I LOVE THAT!
My dad had Altec lansing Voice-of-the-Theater Speakers. The were abut the size of a small washing machine.
Each.
On one live recording of Symphony Fantastique, the guy on the tubular bells came in a half-beat late. (asleep at the switch).
Anyway, it was Leonard Bernstein at the podium and you could almost HEAR the daggers coming out of his eyes and whizzing towards the percussion section! LOL!
I have one recording of the Guarneri Quartet where you can hear that John Dalley, the second violinist, had a cold when they recorded it.