Hi! I'm into dubstep and trap music and I'm trying to learn new things all the time.
https://soundcloud.com/dmgalaxy/minds-ablaze <----- This song is simply amazing, and I can't figure out how the voice leads are made.. They sound reserved and obviously pitched up, but I don't understand how he did the sampling. Anyways, I'm not sure if anyone could help me... But any ideas on how would be much appreciated.

Please include details, I'm very new to sampling.
Thanks!