I agree with Brian Peters, if using DADGAD work in other keys without a capo. I use it a lot in G and C to accomp my wife's duet concertina and singing. I play mostly DADGBD, it's close to standard in that you can play first position chords but needs care chords like F. Fun to watch guitarists in audiences trying to figure while I play as they recognise a C or Bm but then I go unusual with the dm. Very powerful for strumming.