I always thought the original recording was the perfect audio to be sampled. There are no other instruments besides the voice. I built the backing tracks around what I thought would have made good chord changes behind the original part. I can say that I had to manipulate both pitch and tempo of the vocal in order to keep it in tune and steady meter over the backing tracks. And then just to be weird, I put the psychedelic guitar solo at the end which to me sounds a lot like the Bee Girl song from Blind Lemon. Hey, it needed to be done!