Ivan Alexandrovich Wyschnegradsky (September 29, 1979), also transliterated as
Vïshnegradsky,
Wyshnegradsky,
Wischnegradsky,
Vishnegradsky, or
Wishnegradsky (since he emigrated to France, he used "Wyschnegradsky" as spelling for his surname) was a Russian
composer primarily known for his
microtonal compositions, including the
quarter tone scale (24-tet: 50 cents). He also used scales of up to 72 divisions (mainly third (18-tet: 66.
cents), sixth (36-tet: 33. cents), and
twelfth tones (72-tet: 16. cents)).