I have over 5000 live shows on CD and on misc drives (backed up across multiple devices, of course). I'm into music and into Bittorrent, and the artists I like allow taping and sharing of their shows. No way a cellphone can capture a live concert as well as someone who knows what they're doing with mics and other equipment designed for the task. I've listened to snippets of more than one show captured on an iPhone. Pretty bad.
Go to The Traders Den or Dime-a-Dozen and hope someone taped an artist you like and just download it.