Music Recording - Electronic
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Original Caption by Science Service
The "Syntronic Organ" (1934) & The "Photona" (1935) Syntronic Organ was an electro-optical tone generator based instrument engineered by Ivan Eremeef and L. Stokowski and was able to produce "one-hour of continuous variation" created by an optically generated tone using films of tone-wheels.
Ivan Eremeef later created the "Photona" a 12 electro-optical tone generator based system, developed at WCAU radio, Philadelphia, USA.
Courtesy - 120 years of electronic music - http://www.obsolete.com