Four women walked onto a stage inside the building. A moderator explained that they were the Pelargos Quartet, and they were about to perform from inside the helicopters everyone was hearing. A buzz, ...

A decade on, how does Stockhausen’s Helicopter String Quartet really stand up? Frank Scheffer’s gripping documentary follows Stockhausen and the Ardittis as they prepare for the premiere, and his film ...

A buzz, that is, beyond the four helicopters whose steady drone was being relayed through banks of speakers set up to rehearse a crucial part of “Aus Licht,” a marathon performance of selections from ...

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