i heard about a way of recording shows not long ago, but i dont know if it would work. the earpieces that the big bands wear while they are playing are feeding them what they are playing as to avoid echos and getting confused in big arenas. i think the drummer would also have a metronome in their's.
because these earpieces are wireless, its easy to guess that they operate on radio waves. probably the same as a PA system? so if you got a UHF scanner (like a cop scanner) and scanned frequencies, would it be possible to
a) find the frequency and listen
b) record it from the scanner
i also know that some places offer headsets to people in the crowd who are hearing impared. though i doubt most places would have this... but even so, would most shows be broadcast within the crew/band on some form of radio?
thanks