Hence, in the three classes, the tetrachords are equally composed of two tones and a semitone, but when they are regarded separately according to the terms of each class, they differ in the arrangement of their intervals. [Please select]
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There are five tetrachords: first, the lowest, termed in Greek [Greek: hypaton]; second, the middle, called [Greek: meson]; third, the conjunct, termed [Greek: synêmmenon]; fourth, the disjunct, named [Greek: diezeugmenon]; the fifth, which is the highest, is termed in Greek [Greek: hyperbolaion]. [Please select]
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