A key figure in the history of kraut rock, Uli Trepte passed away May 21 after “a long bout with cancer.” He is best known for playing bass in the excellent psych-rock group Guru Guru, whose first three LPs are full of manic, thrilling extended jams. He also worked with Faust, Spacebox, and stellar jazz musicians such as Yusef Lateef, John McLaughlin, and Gato Barbieri.