When I was in college I went to a Q&A with Alan Parsons. He’d been an assistant engineer on The Beatles’ Abby Road album and from there went on to do tons of big stuff.
At the end of the the seminar they opened it up for some questions from the audience.
Quickly the lines at both microphones filled up with college kids wanting to get their question answered…and also simply wanting to be the person who asked something.
A couple good questions roll out and then this kid steps up and starts a monologue about the history of the wiring of 60’s Marshall and Fender amps and how, depending on how the electricity in the building is run, can be prone to loud hums. Particularly something called a 60 cycle hum.
After this and much more, finally the question, “so when you were recording Dark Side Of The Moon what did you do to get rid of the 60 cycle hum?”.
Complete answer: “We didn’t.”
I was so satisfied. Still am.