I have no idea if thats a joke or not. The melody is printed on the walkman. If you wish to hear it then maybe listen to the current entries and see if you can pick out the melody that they are all using.
this is a comment listing every entry + when the walkman melody is used, just because im bored and need something to do.
- if it plays on loop, i just added a '+' after the timestamp
- if there is a loop, i tried to only add the occurences in the first playthrough