- Andrew Barker
ExtractEratocles (probably late 5th cent. bce), musical theorist discussed by *Aristoxenus, empiricist rather than Pythagorean in approach (Aristox. Harm. 5. 9–6. 31, cf. Pl. Resp. 531a–b). He distinguished conjunct from disjunct systems, analysed scales quantitatively, probably using diagrams and measuring intervals as multiples of the quarter-tone, and developed representations of ἁρμονίαι (attunements) as octave-species, orderly transformations of one another.
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