This piece about joy, funk and groove is fun to play. It was written in 1994, inspired by the music of Bob Mintzer and it features the tenor saxophone (improvised solo and written counterpoint lines). The original version for five saxophones is actually a piece for quartet and soloist. In the four-saxophone version, the tenor solo part is integrated in the quartet and the soloist plays in the ensemble. The whole piece is based on clear rhythmic and melodic motives, which develop and flow from one part into the other, thus creating a funky groove. There is a good recording of YO! by the Cologne Saxophone Quintet on their CD YO! – featuring Bob Mintzer (Neuklang).