My cover band is going to play Stevie Wonder's Signed Sealed Delivered, which is originally in F, but our vocalist wants to sing in D. I suppose I'm being a baby here, but I really enjoyed learning it in F, using the open strings. Moving way up to D really sucks the life out of the bassline. Is there a pedal that will easily let me play on the low F fingering, but translates the sound to D? I guess either up or down shift. I'm hoping something very easy where I just click the right number of half-steps up or down. There are a couple of other songs I could use this for, too, where the loss of open strings makes the feel different.