As someone said Music is a great way to stay awake on long , long monitoring nights with nothing else to do. It was done for many years in flying and in ATC worldwide. No need to hide that.When in my centre in the 70's we were 3 guys on duty for a 10 hours shift with 10-20 aircrfat passing through in that period , music was welcome to keep us awake. A VHF call and you'll immediately put the volume down. We've all done that.
Now we have more than 1000 aircrfat passing through in those same 10 hours and the music is long , long gone.
Same I suppose on the A320 cockpit today .
But now, on a Dubai-Melbourne on a A340-600...
