The Optigan
My brother Kelly writes:
An ordinary-looking keyboard, into which you load a plastic disc probably
about 12 inches across …. a clear plastic disc, with visible analog
waveforms printed on it, kinda like if a vinyl LP was bigger,
cardstock-thin, see-through, and the grooves were much LARGER.
My Dad had an Optigan when we were kids; we had much fun playing with it. Â
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