"Calls from the fog" was more austere, starting with a plangent voice from the flutist Roy Amotz that was answered by an echoing electronic drone. They continued on together, Mr. Amotz playing with piercing focus at the top of the instrument 's range and alluring smokiness in his low notes. He met the score's daunting demands for multiphonics, in which special berating and fingerings allow the flute to sound more than one tone at the same time, before broadening near the end into an elegantly, traditionally lyrical line."

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