>>2561629 (lb, comms crystal clear)
I listen to a lot of radio comms anon. Some reasonably clear, some crappy as shit. Every now an then I hear comms that sound like it was recorded in a studio which does make go 'hmmm'. Thing is though, RF is a really funny thing and there are a lot of variables. I mostly listen to FM stuff so don't know how much AM comms (aircraft) can vary but it could come down to whether the mic is any good, whether the transmitter was at precisely the right angle, or if Saturn was in the house of Virgo (joke, but RF is really bizarre at times).
Not saying it's nothing, but also not something to get hung up on.