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
Institute of Musical Instrument Technology Institute of Musical Instrument Technology The Institute of Musical Instrument Technology is the main professional body for all musical instrument makers, tuners and repairers. It was inaugurated on 24 February 1938 and was incorporated on 13 March 1961. According to its website, the Institute is the only professional qualification covering the whole field of musical instrument technology. Sydney A Hurren was the founder of the Institute. Other distinguished members, past and present, include Sir James Jeans, Henry Willis III and Henry Willis IV, Sir James Blades, David Grover (Bentley Pianos), Matthias Stöckle (Renner), Herbert Norman, John Norman, Alexander Kerstan (Steingraeber