Have you seen how many shows are being recorded via the band's wireless IFDs? I'm amazed that this isn't being stopped. There are many NIN shows where people are recording the in-ear audio being sent to the guitar player or Trent Reznor. Usually you can tell my the mix (which instruments are loudest) which band member's feed you are hearing. Usually the frequency response is limited because a full fidelity feed isn't needed, but the clarity is amazing.