Thanks Chris, I think I am close to getting it. What was confusing me was that I was thinking somehow you play completely different chords to put a song in a different key. In actuality, you simply move the capo based on the steps or half steps you need, but you play exactly the same chords. So as you said, if I was asked to play House of the Rising Sun in B Minor, the capo would go on the second fret because there are two half steps between A, A # B?