Pedrillo, when you live it, whatever notions you had before are erased. I think that is why it comes off creepy- you **know** that it isn't real, assume that it can never **sound** real, so when it does it can be a bit freaky.
FWIW we did exactly as you described at THE Show a few weeks ago with VMPS Audio. We had live musicians, recorded them and then played back in the same space.
Having worked with live recordings a lot over the years, its the media that has the most limitation- certainly far more than amps, speakers and microphones, as flawed as they can be a live microphone feed sounds very real.
