interval' of a tetrachord is its largest one.

The Greater Perfect System (systema teleion meizon) was composed of four stacked tetrachords called (from lowest to highest) the Hypaton, Meson, Diezeugmenon and Hyperbolaion tetrachords. These are shown on the right hand side of the diagram. Octaves were composed from two stacked tetrachords connected by one common tone, the synaphe.

At the position of the paramese, the continuity of the system encounters a boundary (at b-flat, b). To retain the logic of the internal divisions

1.Previous
3.Next