A quarter tone is an interval about half as wide (aurally, or logarithmically) as a semitone, which is half a whole tone. Trumpet with 3 normal valves and a quartering on the extension valve (right). Many composers are known for having written music including quarter tones or the quarter tone scale, first proposed by 19th-century music theorist Mikha'il Mishaqah, including: Pierre Boulez, Julian Carrillo, Mildred Couper, Alberto Ginastera, Gerard Grisey, Alois Haba, Charles Ives, Tristan Murail, Krzysztof Penderecki, Giacinto Scelsi, Tui St. George Tucker, Ivan Alexandrovich Wyschnegradsky, Iannis Xenakis (see List of quarter tone pieces).

Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.