De Frumerie Trombone Concerto, Op. 81 (1984-87) III. Allegretto amabile
Christian Lindberg, trombone Bamberg Symphony Orch. Leif Segerstam, cond.
Only one piece I know of began life as a cello sonata, then became a cello concerto, and was finally transfigured into a concerto for trombone. It happens to be this one, probably the most famous work and the final one completed by Swedish composer Gunnar de Frumerie (1908-87), who created this adaption for the great virtuoso Christian Lindberg, heard here.
(Carl Larsson | Breakfast under the big birch, 1896)