Composed as a competiton piece for the Paris Conservatoire, René Duclos' Doubles Sur Un Choral is a challenging yet exciting work for Trombone and Piano.

Dedicated toMonsieur Couillaud, a professor at the conservatory, Doubles Sur Un Choral was published in 1939. Duclos' work addresses features, including complex rhythms, variations in time signatures,modulations, use of chromaticism and accidentals, d...