I've been watching how Dave often capos differently from Gillian (or whomever he is playing with), and then plays out of a different key. For instance, he seems to be at 6 or 7 in the Harper Simon video I posted the other day, playing out of C, maybe? And Harper is playing out of G, maybe? I know that G is 7 steps up from C, but this would be reversed (C being only 5 steps up from G, and he's clearly further up than that). Neither my ear nor my eye for fingering is that good, so my observations could be way off.
Anyway, can one of you guitar experts (or all of you), help me understand what he's doing if he's playing in a different key? I sort of get harmonic minors, but I don't really know how to use them in accompaniment.
After I try to get my head around this with guitar, then I want to learn to apply it to banjo!
Dave will play capo'd up to get the different voicings of the same chords as Gil is playing often with easier fingering for his scale runs and fills.
It also gives it more of a mandolin sound by being higher up the neck, which blends nicely with the rich full bass tone of Gil's guitar.