He plays an instrument he invented, a bass with sympathetic strings, it is an incredible sound. I heard him last night. It was great, he really perfected it. He is a fantastic bass player. He explains the instrument here: There is a series of four album with different tunings, three of them are here: Four Sisters - The Picasso Tunings - YouTube Questions of Prescience - The Picasso Tunings - YouTube Four Sisters - The Picasso Tunings - YouTube I play a short duo with him at this show on Nov. 2nd.