Jürg Frey belongs to the Wandelweiser group of composers, who tend to write slow, quiet, sparse music, interspersed with significant silences. Frey’s Third Quartet is to some extent a typical Wandelweiser creation, with dynamic markings that range from pp to ppppp. Less typical is the whispery voluptuousness of the harmony, which sometimes recalls Schreker or early Schoenberg. This is music of enveloping mystery and enigmatic beauty.