Sylvia Li added a comment - 2019-12-07 10:14 Orchestron Also known as: Vako Orchestron, Optigan Links: Wikipedia ( https://en.wikipedia.org/wiki/Orchestron ) Family: Electronic instruments Description: A keyboard instrument, which produces its sound through electronic amplification of sound pre-recorded on an optical disc. Appearance: https://www.youtube.com/watch?v=xRZRi3V4ptY ( Dieter Vanmarcke demonstrating the ‘Vocal choir’ sound on a Vako Orchestron) https://youtu.be/JCybRH8gIBI?t=11 ( optigandotcom demonstrating the eight original discs made for the Vako Orchestron) Images: https://images.reverb.com/image/upload/s--UeAiUNcp--/a_exif,c_limit,e_unsharp_mask:80,f_auto,fl_progressive,g_south,h_620,q_90,w_620/v1463021552/vlv4yrove0uwta29uxlo.jpg (Reverb, VAKO Orchestron) https://thumbs.worthpoint.com/zoom/images1/1/0412/06/vako-orchestron-model-keyboard_1_dae026b4a6fd942a60fa24b5bb1a295a.jpg  (WorthPoint, Vako Orchestron with discs) Origin: Vako Synthesizers Incorporated, founded by David Van Koevering, began developing the Orchestron in 1975 Usage and historical data:    It was intended to be a competitor to the Mellotron ( https://musicbrainz.org/instrument/3715ab17-124b-4011-b324-d2bb2cd46f6b , MusicBrainz), however it was not very successful German band Kraftwerk was a very early adopter of this instrument An estimated 70 to 100 Orchestrons were made before production ceased Relationships: Some Orchestron models also contained a synthesizer [MusicBrainz | https://musicbrainz.org/instrument/4a29230c-5ab5-4eff-ac59-4a253f3561a0 ]