Info on the players, the piece, and download, at the link:
http://www.jamendo.com/en/album/49528
Metal & Glass Ensemble is a Boston-based improvisational group with a rotating membership who create acoustic drone-based music with bowed cymbals and other metal objects, and glasses tuned to a just-intoned 23-note octave. This just scale, employing whole-number ratios akin to a natural harmonic overtone series, is the only formal tuning used in the group. The bowed metal generates its own shifting but interrelated pitch classes, while the instrumental players contribute using a variety of microtonal intonations. In this way the music is liberated from the 12-tone equal-tempered octave, and explores a broad spectrum of harmonic relationships.
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