I am a little dubious of these "recordings" as being live.Read about a time when a B-17 pilot & co-pilot, whose bunks were alongside each other, after a long mission into Germany started talking in their sleep. Others realized they were replaying the whole day's conversation in the cockpit. They got a tape recorder & recorded most of the exchanges between the 2 sleeping pilots. Wonderer what happened to the tape.
Apparently they were "replaying" it in their minds & verbally communicating the cockpit conversations from memory, probably stress induced. Someone had a tape recorder in the barracks.I am a little dubious of these "recordings" as being live.
I am unsure whether the technology existed for the mass installation of the equipment into bombers, my impression is that they are more likely to be transcripts of the mission recorded later especially given how sterile the conversation is.