I love his voice sooooooo much! You guys should check him out. Bill Callahan. He dated Joanna Newsom, he was the inspiration of Ys and also parts of Have One On Me. He sings backup on some of Ys, and she sings backup on his albums - and also played piano. You can here his voice on my favorite Jo song "Only Skin" which is heartbreaking when you think of it being about the two of them.