Par COLL FRANCISCO. With this masterful 8-minute work Coll - a trombonist himself - has created a major addition to the instrument's repertoire. The Chanson is almost Bergian with its dark harmonies and slow-burning passion, unfolding as a song without words whose broad lines exploit the whole compass of the instrument, from pale heights to baleful, gritty depths. The angular Bagatelle which follo…