Assertion: composer's music | /r/HasProperty | a kind of homage
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text: Glass turned to a more "rigorous approach" to his "most basic minimalist technique, additive process", pieces which were followed in the same year by Music in Contrary Motion and Music in Fifths (a kind of homage to his composition teacher Nadia Boulanger, who pointed out "hidden fifths" in his works but regarded them as cardinal sins).