Phill Niblock, a core member of New York’s experimental art and music scenes, has died at 90. His death was announced on Monday by Blank Forms, a curatorial platform focused on experimental performance and music.

Niblock made music from drones, microtones, and instruments such as cellos, bagpipes, hurdy-gurdies, and more. He remains best-known for the spare sounds he produced, but he also amassed a formidable oeuvre of photography, films, and videos.

Some attempts to classify his vast output have ranged widely, with some labeling him a structuralist, a Minimalist, or quite simply a musician. But Niblock, ever eager to defy categorization, preferred the terms “composer” and “intermedia artist,” and stated that he saw no conceptual through-lines across his work in various mediums.