Reply #10: Aha! The plot thinnens. I have heard of the Circle of Fifth's.

[fob]

I don't recall exactly how it goes but I know what to look for.

So here's my next question; In the Blues Brothers, when the band is at Bob's Country Bunker and Gimme Some Livin' doesn't go over too well, they get together and say "What are we gonna do now?". They come up with Theme from Rawhide, and the one guy says "What key?", and the bassist (I think) says "A, a good country key". How does that give them the info necessary to play a song?

Aren't the notes you play the same regardless of the key? Or is it the position (I,V,IV) that stays the same and the notes (G,C,D) that change?