John Cage's 'As Slow As Possible'
More than a decade after his death, American composer John Cage continues to challenge listeners. When Cage wrote a piece called As Slow As Possible, he expected a performance would last about a half hour. But as NPR's Jeffrey Freymann-Weyr reports, a group of Cage scholars started a performance of the piece in Germany two years ago, and hope that it will last more than six centuries.
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