I must be dense as I look at this subject. I understand that there is a 1 4 5 for every key, and I know those chords. I also understand that 2 3 and 6 are the minor chords. However, that being said, I still don't understand what it means to play in a specific key?? Let's take the song House of the Rising Sun for an example. Based on the chords used which are Am C D F and E, I assume that this song is played in the key of C. Please correct me if I am wrong that its the Key of C. Assuming someone says let's play it in the Key of A, how do those chords change? That's my question? If you wanted it played in the Key of A, does that mean just use a CAPO on the 5th fret and play the same chords?? How do the actual chords created for a song change when you switch keys?? Would you suddenly use A D E and Bm to play it? HELP...Thanks