Archestratus (Greek, Ancient (to 1453);: Ἀρχέστρατος Archestratos) was a harmonic theorist in the Peripatetic tradition and probably lived in the early 3rd century BC. Little is known of his life and career. Athenaeus' reference (XIV.634d) to an Archestratus who wrote On auletes (Περὶ αὐλητῶν) in two books is perhaps to him; it is a "rather remote" possibility that he is identical with Archestratus of Syracuse.
The most substantial evidence for Archestratus' ideas is in a passage of Porphyry's commentary on Ptolemy's Harmonics, pp. 26–27 Düring (the "<>" are from the original):