Today is the anniversary of Harry Partch's birth. Born in 1901, Partch was an American composer and instrument creator. He was one of the first twentieth-century composers to work extensively and systematically with microtonal scales, writing much of his music for custom-made instruments that he built himself, tuned in 11-limit (43-tone) just intonation.
Here is a spoof that mentions an upcoming Harry Partch product:
Today is also the birthday of Terry Riley, who turns 76. An American composer, Riley is intrinsically associated with and a pioneer of the minimalist school of Western classical music. We love his "In C":