Timotheus of Miletus in Wikipedia

Timotheus of Miletus (c. 446-357 B.C.) was a Greek musician and dithyrambic poet. He added one or more strings to the lyre, whereby he incurred the displeasure of the Spartans and Athenians (E. Curtius, Hist of Greece, bk. v. ch. 2). He composed musical works of a mythological and historical character. He spent some years in the court of Archelaus I of Macedon Fragments in T. Bergk, Poetae lyriei graeci. A papyrus-fragment of his Persians (possibly the oldest Greek papyrus in existence), discovered at Abusir has been edited by U. von Wilamowitz-Mollendorff (1903), with discussion of the nome, metre, the number of strings of the lyre, date of the poet and fragment. See V. Strazzulla, Persiani di Eschilo ed il nomo di Timoteo (1904); S. Sudhaus in Rhein. Mus., iviii. (1903), p. 481; and T. Reinach and M. Croiset in Revue des etudes grecques, xvi. (1903), pp. 62, 323.

Link: https://en.wikipedia.org/wiki/Timotheus_of_Miletus