Pieter Duker’s challenge for playing the trombone in the CTJB is to match the sound, range, and dynamics of his improvisations to the varied repertoire of the band. Pieter, who founded the CTJB in 1968, is inspired by a wide range of interpretations on how to play this wind instrument. This varies from Chris Barber with his masculine and syncopic manner of playing in predominantly the lower and middle registers to Urbie Green with his lyrical and symphonical manner of playing in the high register.