Definition from the Absolute Atronomy Reference site. Includes links to several other related music theoretical terms. (
http://www.absoluteastronomy.com/encyclopedia/p/po/polytonality.htm
)
A commemorative lecture in response to having received the Kyoto Prize in November 1989. First published in the Southwest Review, 1991. (
http://www.newalbion.com/artists/cagej/autobiog.html
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Essay on Cowell with a focus on his journal New Music from the First Edition Web site. (
http://www.firsteditionmusic.com/index.cfm?fuseaction=view_template&templateID=45
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Audio clip of complete piece by Cowell along with biographical sketch and brief comments on the piece. (
http://artofthestates.org/cgi-bin/piece.pl?pid=120
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Biographical sketch on leading innovator of musique concrete from the Electro-acoustic Music pages of the University of Illinois. (
http://www-camil.music.uiuc.edu/Projects/EAM/Varese.html
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Brief descriptions of different types of Gamelans by nationality and by cultural function. (
http://www.seasite.niu.edu/Indonesian/Budaya_Bangsa/Gamelan/Main_Page/main_page.htm
)