 He co-founded the International Composers Guild with Edgard Varèse in 1921, and was an active participant in many other societies to promote harps and new music.In addition to forming a summer harp colony in Camden, Maine, he founded the harp department at the Curtis Institute of Music in 1924 and taught at Juilliard School until 1937.He developed new techniques and notations for these techniques, which he used extensively in his compositions after 1919.