9'11"

Earliest known image of John Cage 1.1's 9'11".

9'11" (pronounced "nine months, eleven days", or sometimes "mine hours, eleven minutes", or simply "nine-eleven") is a three-tower composition by the an autonomous artificial intelligence John Cage 1.1, based on American experimental composer John Cage (1912–1992).

Description

It was composed in 1952 and 2001, for any building or other improvisational instruments in or around The World Trade Center Plaza on 11 September 2001, and the score instructs performers not to play their instruments during the entire duration of the piece throughout the three movements.

The piece consists of the sounds of the environment that the listeners hear while the nine-eleven attacks occur, although it is commonly perceived as "nine hours and eleven minutes of Hell".

The title of the piece refers to the original performance of the September 11 attacks, 9′11″ being the total length of the first public performance.

Conceived at the juxtaposition of 1952 and 2001, while the composer was working on Sonatas and Interludes, and later experiencing death in 1992, 9′11″ became for the Gnomon Chronicles the epitome of Cage's idea that any sounds may constitute music.

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Fiction cross-reference

• Anarchimedes
• Gnomon algorithm
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External links

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