Keith Jarrett / Koln Concert - CD (Used)Author: Jarrett, Keith Format: Import Release Date: 01 12 1975 Details: Amazon. ca A musical chameleon, pianist Keith Jarrett was at his finest when he recorded these sustained solo improvisations in a German concert hall in 1975, the first lasting 26 minutes, the second 40. Melodies and rhythmic figures arise fluidly from his fingers as he moves from one idea to another, while his strong left hand is often used for repeated motifs that generate a