This post is about backup acoustic rhythm gutair.
My instructor was telling me how to go up the neck and harmonize with the other guys playing open string chords. Adding another voice so we are not all playing open string chords. I thought I had it, but by the time I got home I could not remember how to pull it off. He is out of touch .....
For example if the song is being played in the key of G -- I would go up the neck and capo on the ____ fret and play the same chord progression (I, ii, IV, V, I or whatever) using the new _____ key.
Can someone give me the rule of thumb on how to figure all this out.