ZahlenABCUsw audio opensource_audio Sound file created from a paper print of an Emile Berliner gramophone disc dated December 14, 1889. The trace is presented three times at constant rotational speeds of approximately 175, 87.5, and 43.75 rpm. Credits: 3200 dpi scan by Stephan Puille; sound file produced using the "optical film sound track" technique by Patrick Feaster (April 2010). Berliner; gramophone http://creativecommons.org/licenses/by/3.0/us/ 2010-04-11 02:18:01 2010-04-11 02:17:34 pfeaster@gmail.com 2010-04-11 02:20:29 Patrick Feaster