He wrote dozens of pieces for basset horn ensembles. Stockhausen himself led Marelli to devote himself to the basset horn. Karlheinz Stockhausen has also composed for the alto clarinet and basset horn. Franz Danzi wrote a Sonata in F, for basset horn and piano, Op. "Treue" (Fidelity), for E clarinet, basset horn, and bass clarinet. Deep clarinets (basset horn, alto clarinet, bass clarinet) are not produced. She plays the "corno di bassetto" or basset horn, clarinet and bass clarinet. Hubert Salmhofer (born July 24, 1964) is an Austrian clarinetist and basset horn player. The basset horn parts were written for fellow Freemasons Anton David and Vincent Springer.