Jimmy,
You are probably right about the channel being 5 not 4 - been a long time since I fooled around with Tune 1000. ;-)
I am not a singer, but I have done some programming of VH for others in the past.
The VH is pretty well explained in the Reference Manual for the S950 starting on page 85.
You can download the manual for free from Yamaha at the following link:
http://www.yamaha.co.jp/manual/english/index.phpIf you want some detailed help with this just e-mail and I try my best.
Bill G