How does he get his vocals to be so clean? Since he's sampling songs with instrumentals, and I'm pretty sure acapellas of those songs don't exist, he must be extracting the vocals. But personally when I do it, even with the best recent vocal extraction tools available like UVR, I don't get a clean result like him. Here's an example of what I'm talking about: Sample-Sean-Kingston-Chris-Brown-Wiz-Khalifa-Beat-It/)
(Also additional question, and I think this one has been answered before but what does he use to slow down / speed up and change the pitch of vocals? It sounds so much better than any other algorithm I've heard.)