On the stage of the Grand Music Hall of Basel, Switzerland one day last week sat two strange contraptions. One resembled a telephone switchboard with a set of loudspeakers attached. The other looked like a small spinet but was connected to two loudspeakers and a lute-shaped soundbox. The gadgets were known as the "Mixturtrautonium" and the "Ondes Martenot." Both produce more or less musical tones electronically, and they were to be featured soloists in a concert for the delegates to the first International Congress of Electronic Music and Musique Concrète.
Slithery Glissando. The Mixturtrau-tonium, originally developed by a German physics professor in...
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