Geophone (musical instrument) Geophone (musical instrument) The geophone is a percussion instrument, invented by the French composer Olivier Messiaen for use in his large composition for piano and orchestra entitled "Des canyons aux étoiles…" ("From the canyons to the stars…"). It consists of a drum filled with thousands of small lead pellets, and is played by swirling it around slowly so that the noise of the pellets resembles the sound of dry shifting earth. Messiaen commissioned a Parisian instrument maker to construct one to his design, and he carried this instrument worldwide to early performances of the piece (which was given its first
American Musical Instrument Society American Musical Instrument Society The American Musical Instrument Society (AMIS) was formed in 1971 "to promote study of the history, design, and use of musical instruments in all cultures and from all periods" (the branch of musicology known as organology). Based in the United States, it publishes a journal and a newsletter, holds annual conferences (occasionally in conjunction with the Galpin Society), maintains an active website and e-mail forum, and presents five awards. The society's international membership includes collectors, curators, historians, performers, instrument makers, conservators, restorers, dealers, teachers, and students. The "Journal of the American Musical Instrument Society, "(ISSN 0362-3300)