Hi Walt, I'm sure the very brilliant musicians on the JMDL will answer your question better than I could. So I'll leave the music theory to them. What I would recommend is reading the article written for Acoustic Magazine by Jeffery Rodgers. It is, to my knowledge the definitive article that reveals Joni's guitar technique. -I'm sure it's archived on the JMDL website. No? I was taking a train into Chicago and as I got on board, my good friend Diane handed me this issue, saying, "I don't know if you have this already, but I thought you might be interested."
It was THE coolest gift ever. I was trembling with excitement reading that article. All the 'mystery' of Joni's guitar technique was lifted away. It is a GREAT read, so I hope you will look for it. It interviews Joni, with lots of revealing information. The photographs of her are sooo beautiful. There's a transcript of 'Just Like this Train' and even a list of her guitar gear. -How's that for cool? If anyone else on the list has missed this beauty, I do hope you'll check it out. John.