ANS

Optical soviet synthesizer. 


Virtual ANS is a software simulator of the unique Russian synthesizer ANS - photoelectronic microtonal/spectral musical instrument created by Russian engineer Evgeny Murzin from 1938 to 1958. Murzin named his invention in honour of the composer Alexander Nikolayevich Scriabin.
The instrument was used by Stanislav Kreichi, Alfred Schnittke, Edison Denisov, Sofia Gubaidulina, Edward Artemiev and other Soviet composers.
You can hear the sound of the ANS in Andrei Tarkovsky's movies Solaris, The Mirror, Stalker.
In 2004, the British experimental group Coil released CoilANS, a boxed set of experimental drone music performed on the ANS. 

http://warmplace.ru/soft/ans/