Kid Beyond

I think you have to watch this. This is crazy. Very intersting. He beatboxes and creats some loops through a sampler, and then keeps beatboxing or singing to build layers to perform a song. My question is that when he records the second or third loop, he must record the first rythm part together because he is imrovising the loops and the mic should catch all the sounds out of speakers. Doesn't it matter? I wonder if a track could be very chaotic and just noisy.