English: A geophone, photographed following the Ohio premiere performance of w:Des canyons aux étoiles… by w:Olivier Messiaen. This geophone is essentially a medium-sized single-headed tom-tom, placed upside-down and filled with several dozen pellets of w:lead shot, marbles, pebbles, xylophone mallet heads, and a variety of other small spherical and ovoid objects.
This geophone was assembled for this performance by Oberlin Conservatory of Music visiting professor of percussion w:Allen Otte, and was played by one of the members of The Oberlin Contemporary Music Ensemble's percussion section (Ryan Packard, David Vohden, Jake Harkins, Ed Atkinson, and Ben Bacon). The "CCM" marked in black magic marker on the inside of the drum stands for "w:University of Cincinnati College-Conservatory of Music," where Otte has been a professor of percussion for many years.
Allen Otte wrote the following about this instrument to the uploader of this photo (in an email dated 13 December 2008):
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue
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==Summary== {{Information |Description=A geophone, photographed following the Ohio premiere performance of ''Des canyons aux étoiles…'' by Olivier Messiaen. This geophone is essentially a medium-sized single-headed [[t