| http://www.w3.org/ns/prov#value | - In the early decades of the 20th century, composers such as Juli??n Carrillo, Mildred Couper, Alois H??ba, Charles Ives, Erwin Schulhoff, Ivan Wyschnegradsky turned their attention to quarter tones (24 equal intervals per octave), and other finer divisions.
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