His partner, Katherine Liberovskaya, said he died in a hospital of heart failure after years of cardiac procedures. Mr. Niblock had no formal musical training. He served as the foundation’s sole director from 1985 until his death, and he was also the curator of the foundation’s record label, XI. His loft on Centre Street in Lower Manhattan served as a performance space for the foundation. It was also a social nexus for boundary-pushing musicians and composers like John Cage, Arthur Russell, David Behrman and Thurston Moore of Sonic Youth.

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Persons: Phill Niblock, Katherine Liberovskaya, Niblock, Elaine Summers, John Cage, Arthur Russell, David Behrman, Thurston Moore Organizations: Sonic Youth Locations: New York, Manhattan, Lower Manhattan