I came across the sample used in serial killla by snoop and i am wondering how they get all of the background noises gone. Sounds like he used the original loop just sped up a lil bit, just really good filters or many layers to hide it i dunno??
Even if you came across the sample it might not be THE sample. Dre maybe got a extended version with some other instrumental parts, Dre maybe got it replayed, or Dre maybe just filtered it alot.