Using a banjo capo can be a lifesaver. What I mean is that you can change the key you play the song in and not change how you play the song on the instrument. For example, let’s say you are picking the tune: “Lonesome Road Blues” in open G without a capo. However you discover that the person that wants to sing the song wants to sing it in the key of “A”. All you have to do is attach the capo closely behind the second fret and then tune your 5th string up to “A”. Then you can play the song as before only now you are playing the vocal requested key. However, you must adjust your thinking to realize that all the fingering is moved up two frets. Warning: watch out for the “dots”.