Obviously, the VH on the keyboard is being over-driven. Robbie is a great entertainer, but he needs to go to the PSR Tutorial and take a good look at the lessions posted by Big 741, Dan Rymut. Dan has done a wonderful job of mastering Yamaha's vocal processors, made some fantastic recordings, and provides the insight as to how this was accomplished.

I'm not defending Yamaha's vocal processors, and I currently use a TC Harmony-M, which has been discontinued. However, have played with the S-950's built-in vocal processor a bit, I found Dan's setup information to be spot on.

Good Luck,

Gary