Marcel Duchamp's gap music / chance compositions / experimental compositions / musical sculpture / erratum musical...

"One can look at seeing; one can not hear hearing."
-Marcel Duchamp, Green Box, 1934

A useful site on Marcel Duchamp, with a section on his works of music and related collaborations:
http://members.chello.nl/j.seegers1/dada_files/music_duchamp.html

The term "gap music" is used in Craig Adcock's article:
Craig Adcock 'Marcel Duchamp's Gap Music. Operations in the Space between Art and Noise', in Douglas Kahn and Gregory Whitehead (eds.), Wireless Imagination. Sound, Radio, and the Avant-Garde (MIT Press : Cambridge MA 1992).

Important works to review:

The entire musical work of Marcel Duchamp Ampersand : Chicago IL 2001 1 sound disc (48 min.) S.E.M. Ensemble (Petr Kotik, alto flute; James Kasprowicz, trombone; William Lyon Lee, celesta; John Bondler, glockenspiel). Recorded at Studi Regson, Milan, May 7, 1976. Multhipla Records, Milano, No.1, 1976. Petr Kotik Composer and Conductor.

The entire musical work Dog W/A Bone : New York, 2000 1 sound disc : digital, stereo

For further reference: "Aleatoric Arts Timeline" - http://web.mala.bc.ca/guppy/crew410/aleatory%20history_and_timeline.htm

Also: "Erratum Musical" by Chen Ya-ling - http://www.toutfait.com/duchamp.jsp?postid=805&keyword (source: tout-fait, The Marcel Duchamp Studies on-line journal, issue 1, 1999)