The Latin phrase De Profundis translates as ‘out of the depths’ – and this is certainly an appropriate title for this solo work for bass trombone, since the deep voice of the instrument is featured extensively. This special piece is written without prescribed measures (senza misura). Microtone intervals, the use of specific physical movements and the use of a ‘plunger’ mute turn this piece into an adventurous and one-of-a-kind addition to the repertoire of the bass trombone.