Since working with James Brown, the saxophonist has gone on to make quite a name for himself, playing with a wide range of artists, including George Clinton, Prince, Bryan Ferry, Keith Richards, and The Red Hot Chili Peppers.
On valve horns, however, different crooks are built into the instrument, and the (three) valves make it possible to engage the crooks while playing, greatly expanding the range of notes available at any one time.