It's the man who created lots of groups:Simon&Garfunkel (it was Simon & Kooper!), many blues bands, Blood Sweat and Tears, with Mike Bloomfield ... was firsts with his Hammond sound who made Bob Dylan big ... In this record he used "Ondioline", the first string synth (bad!), recorded many parts, made a song of "Nothing" ... Work of art recorded at Columbia Studio A. And, surprise, he was a guitarrist!