Aristoxenus (Greek: Ἀριστόξενος; fl. 335 BC) of Tarentum was a Greek Peripatetic philosopher, and a pupil of Aristotle. Most of his writings, which dealt with philosophy, ethics and music, have been lost, but one musical treatise, Elements of Harmony, survives incomplete, as well as some fragments concerning rhythm and meter.
Aristoxenus was born at Tarentum, and was the son of a learned musician named Spintharus (otherwise Mnesias). He learned music from his father, and having then been instructed by Lamprus of Erythrae and Xenophilus the Pythagorean, he finally became a pupil of Aristotle, whom he appears to have rivaled in the variety of his studies. According to the Suda, he heaped insults on Aristotle after his death, because Aristotle had designated Theophrastus as the next head of the Peripatetic school, a position which Aristoxenus himself had coveted having achieved great distinction as a pupil of Aristotle. This story is, however, contradicted by Aristocles, who asserts that he never mentioned Aristotle but with the greatest respect.
Overview of his works 
His writings, said to have consisted of four hundred and fifty-three books, were in the style of Aristotle, and dealt with philosophy, ethics and music. The only work of his that has come down to us is the three books of the Elements of Harmony, an incomplete musical treatise. Aristoxenus' theory had an empirical tendency; in music he held that the notes of the scale are to be judged, not as the Pythagoreans held, by mathematical ratio, but by the ear. Vitruvius in his De architectura paraphrases the writings of Aristoxenus on music. His ideas were responded to and developed by some later theorists such as Archestratus, and his place in the methodological debate between rationalists and empiricists was commented upon by such writers as Ptolemais of Cyrene.
The theory that the soul is a "harmony" of the four elements composing the body, and therefore mortal ("nothing at all," in the words of Cicero), was ascribed to Aristoxenus (fr. 118-121 Wehrli) and Dicaearchus. This theory is comparable to the one offered by Simmias in Plato's Phaedo.
Elementa harmonica 
In his Elements of Harmony, Aristoxenus attempted a complete and systematic exposition of music. The first book contains an explanation of the genera of Greek music, and also of their species; this is followed by some general definitions of terms, particularly those of sound, interval, and system. In the second book Aristoxenus divides music into seven parts, which he takes to be: the genera, intervals, sounds, systems, tones or modes, mutations, and melopoeia. The remainder of the work is taken up with a discussion of the many parts of music according to the order which he had himself prescribed.
Aristoxenus rejected the opinion of the Pythagoreans that arithmetic rules were the ultimate judge of intervals and that in every system there must be found a mathematical coincidence before such a system can be said to be harmonic. In his second book he asserted that "by the hearing we judge of the magnitude of an interval, and by the understanding we consider its many powers." And further he wrote, "that the nature of melody is best discovered by the perception of sense, and is retained by memory; and that there is no other way of arriving at the knowledge of music;" and though, he wrote, "others affirm that it is by the study of instruments that we attain this knowledge;" this, he wrote, is talking wildly, "for just as it is not necessary for him who writes an Iambic to attend to the arithmetical proportions of the feet of which it is composed, so it is not necessary for him who writes a Phrygian song to attend to the ratios of the sounds proper thereto."
Thus the nature of Aristoxenus' scales and genera deviated sharply from his predecessors. Aristoxenus introduced a radically different model for creating scales. Instead of using discrete ratios to place intervals, he used continuously variable quantities. Hence the structuring of his tetrachords and the resulting scales have other qualities of consonance.
On rhythmics and metrics 
Part of the second book of a work on rhythmics and metrics, Elementa rhythmica, is preserved in medieval manuscript tradition.
Aristoxenus was also the author of a work On the Primary Duration (chronos).
Other works 
The edition of Wehrli presents the surviving evidence for works with the following titles (not including several fragments of uncertain origin):
- Life of Pythagoras (Πυθαγόρου βίος): fr. 11 Wehrli
- On Pythagoras and his pupils (Περὶ Πυθαγόρου καὶ τῶν γνωρίμων αὐτοῦ): fr. 14 Wehrli
- On the Pythagorean life (Περὶ τοῦ Πυθαγορικοῦ βίου): fr. 31 Wehrli
- Pythagorean maxims or Pythagorean negations (Πυθαγορικαὶ ἀποφάσεις): fr. 34 Wehrli
- Educational customs or Rules of education (Παιδευτικοὶ νόμοι): fr. 42-43 Wehrli
- Political laws (Πολιτικοὶ νόμοι): fr. 44-45 Wehrli
- Mantinean character (Μαντινέων ἔθη): fr. 45, I, lines 1-9 Wehrli
- Praise of Mantineans (Μαντινέων ἐγκώμιον): fr. 45, I, lines 10-12 Wehrli
- Life of Archytas (Ἀρχύτα βίος): fr. 47-50 Wehrli
- Life of Socrates (Σωκράτους βίος): fr. 54 Wehrli
- Life of Plato (Πλάτωνος βίος): fr. 64 Wehrli
- On tonoi (Περὶ τόνων): a brief quotation in Porphyry's commentary on Ptolemy's Harmonics, p. 78 Düring (not edited by Wehrli)
- On music (Περὶ μουσικῆς): fr. 80, 82, 89 Wehrli
- On listening to music or Lecture course on music (Μουσικὴ ἀκρόασις): fr. 90 Wehrli
- On Praxidamas (Πραξιδαμάντεια): fr. 91 Wehrli
- On melodic composition or On music in lyric poetry (Περὶ μελοποιίας): fr. 93 Wehrli
- On musical instruments (Περὶ ὀργάνων): fr. 94-95, 102 Wehrli
- On auloi (Περὶ αὐλῶν): fr. 96 Wehrli
- On auletes (Περὶ αὐλητῶν): fr. 100 Wehrli
- On the boring of auloi (Περὶ αὐλῶν τρήσεως): fr. 101 Wehrli
- On choruses (Περὶ χορῶν): fr. 103 Wehrli
- On tragic dancing (Περὶ τραγικῆς ὀρχήσεως): fr. 104-106 Wehrli
- Comparisons of dances (Συγκρίσεις): fr. 109 Wehrli
- On tragic poets (Περὶ τραγῳδοποιῶν): fr. 113 Wehrli
- Life of Telestes (Τελέστου βίος): fr. 117 Wehrli (according to whom this Telestes is the dithyrambic poet)
- Miscellaneous table talk or Sympotic miscellany (Σύμμικτα συμποτικά): fr. 124 Wehrli
- Notes or Memorabilia (Ὑπομνήματα), Historical notes (Ἱστορικὰ ὑπομνήματα), Brief notes (Κατὰ βραχὺ ὑπομνήματα), Miscellaneous notes (Σύμμικτα ὑπομνήματα), Random jottings (Τὰ σποράδην): fr. 128-132, 139 Wehrli
- Suda, Aristoxenos; Aelian, H. A. ii. 11.
- Aulus Gellius, iv. 11; Cicero, Tusc. Disp. i. 18
- Suda, Aristoxenos
- Aristocles ap. Eusebius, Praeparatio Evangelica xv. 2
- Vitruvius, Book V Chapter IV
- Cicero, Tusculanae Quaestiones 1.22.51, cf. 1.11.24
- Sir John Hawkins, (1868), A general history of the science and practice of music, Volume 1, pp. 66-7
- John Chalmers, (1993) Divisions of the Tetrachord, Chapter 3, pp. 17–22. Frog Peak Music. ISBN 0-945996-04-7.
Editions and translations 
- Barker, Andrew (1989). Greek Musical Writings, vol. 2: Harmonic and Acoustic Theory (Cambridge), pp. 119–89, English translation with introduction and notes, ISBN 0-521-61697-2
- Macran, Henry Stewart (1902). The Harmonics of Aristoxenus (Oxford), Greek text with English translation and notes (archive.org, Google Books)
- Marquard, Paul (1868). Die harmonischen Fragmente des Aristoxenus (Berlin), Greek text with German translation and commentary (archive.org, Google Books)
- Pearson, Lionel (1990). Aristoxenus: Elementa rhythmica. The fragment of Book II and the additional evidence for Aristoxenean rhythmic theory (Oxford ), Greek texts with introduction, translation, and commentary, ISBN 0-19-814051-7
- Wehrli, Fritz (1967). Die Schule des Aristoteles, vol. 2: Aristoxenos, 2nd. ed. (Basel/Stuttgart), Greek text (excluding the harmonic fragments, rhythmic fragments, On the Primary Duration, and On tonoi: see p. 28) with commentary in German
- Westphal, Rudolf (1883-1893). Aristoxenus von Tarent: Melik und Rhythmik des classischen Hellenenthums, 2 vols. (Leipzig) (vol. 1, vol. 2)
- Westphal, Rudolf (1861). Die Fragmente und die Lehrsätze der griechischen Rhythmiker (Leipzig), pp. 26–41, Greek text of Elementa rhythmica and On the Primary Duration (Google Books)
Further reading 
- Barker, Andrew (1978). "Hoi Kaloumenoi harmonikoi: The Predecessors of Aristoxenus". Proceedings of the Cambridge Philological Society 24: 1–21.
- Barker, Andrew (1978). "Music and Perception: A Study in Aristoxenus". Journal of Hellenic Studies 98: 9–16.
- Bélis, Annie (2001). "Aristoxenus". In Stanley Sadie and John Tyrrell (eds.). The New Grove Dictionary of Music and Musicians 1. London: Macmillan Publishers. p. [page needed].
- LaRue, Richard (1966). "Aristoxenus and Greek Mathematics". Aspects of Medieval and Renaissance Music. New York: W. W. Norton and Co.
- Henderson, Isabel (1957). "Ancient Greek Music". In Wellesz, Egon. Ancient and Oriental Music. The New Oxford History of Music 1. London: Oxford University Press.
- Huffman, Carl (2012). Aristoxenus of Tarentum: Texts and Discussions. New Brunswick: Transactions Publications.
- Levin, Flora (1972). "Synesis in Aristoxenian Theory". American Philological Transactions 103: 211–234.
- Lippman, Edward (1964). Musical Thought in Ancient Greece. New York: Columbia University Press.
- Rowell, Lewis (1979). "Aristoxenus on Rhythm". Journal of Music Theory 23 (Spring): 63–79.
- Winnington-Ingram, R. P. (1980). "Aristoxenus". In Stanley Sadie (ed.). The New Grove Dictionary of Music and Musicians 1. London: Macmillan Publishers. p. [page needed].