OMG thanks so much guys. You really hit on what i was looking for, esp MarkPav. I noticed when playing in C there came a part of the song that normally called for a key change and i kept on playing in C while the singer had shifted to F!!! It was incredible to me that i could keep on playing in C and still have the singer sing in F. What is the theory behind this and who do i know if a key will "fit" in another?