[nearmiss]

Are you saying pilots were flying and listening to music and other radio broadcasts (non-military communication)?

I realize the 1940s were big years for radio broadcasting, but I've never read any accounts of pilots listening to entertainment radio while on missions.

AM = is the method of shortwave broadcasting.

Everyone back then had shortwave receivers, but they did require very careful tuning, which would have been difficult to do while flying.

Maybe in a bomber where you had a radioman it was possible. I don't recall any accounts of pilots tuning in to entertainment radio on missions.

It would have been possible in some instances to receive entertainment radio while flying, radio waves were filling the air during WW2.