Aurelian of Réôme (Aurelianus Reomensis) (fl. c. 840 – 850) was a Frankish writer and music theorist. He is the author of the Musica disciplina, the earliest extant treatise on music from medieval Europe.
Next to nothing is known about his life but what can be inferred by the treatise itself. For a time he was a member of the monastery at Saint Jean de Réôme, in the Côte-d'Or near the present-day town of Moutiers-Saint-Jean. Aurelian said in his treatise that he was a former monk of Réôme, but had been dismissed from the community for an unspecified offense; he wrote the treatise as a form of penance, both at the request of his colleagues who needed his specialized knowledge, and as an attempt to supplicate Abbot Bernard of St Jean de Réôme; whether or not he was admitted back into the monastery as a result of his writing is not known. There is a record of an abbot named Bernard at St Jean de Réôme beginning in 846, who shortly afterward became bishop of Autun; this has helped establish the date for the treatise.[1]
There has been an attempt to associate Aurelian of Réôme with Aurelian, archbishop of Lyon from 876 to 895, but the evidence for this is circumstantial at best.
The Musica disciplina is like the other more famous contemporary treatises (Musica and Scolica enchiriadis, Hucbald of Saint-Amand, Regino of Prüm etc.) one of the earliest Carolingian chant treatises which combine the reception of Ancient Greek music theory (ἁρμονικαὶ) with questions relevant to the contemporary performance of liturgical chant. Isidore of Seville wrote with a similar impact on contemporary Visigothic chant about music, while his subject was the music of antiquity as well.
Aurelian's work is one of the earliest authors concerned about Carolingian plainchant, still within the period during which Gregorian chant became standardized by its oral transmission in northern and western Europe. One copy became the earliest extant sample of musical notation, although it was added later.[2] Hence, the particular notational scheme which was used so far by a later scribe resisted definitive interpretation, and it only appears randomly in the earliest manuscript.[3]
One of the most important topics covered in the Musica disciplina, to contemporary scholars, is the eight Tones (octoechos), today known as the church modes which Aurelian called "toni". As sources of the mathematic science, Aurelian used Isidore of Seville, Cassiodorus, and above all Boethius,[4] but the eight Tones were more likely imported from Byzantine music during the 8th century, though his treatise belonged to a Carolingian chant treatise type called tonary (chapter IX-XVII).[5]
The treatise was completed by several lists and descriptions of more than 100 chants. Like other tonaries of the time, no musical notation had been used originally.
He did not only refer to the octave species (modi) used by the ancient Greeks as well as by Boethius (Dorian, Phrygian, etc.), he also used names of intonation formulas communicated between chanters, such as noannoeane, and noeagis. They were obviously inspired by the Byzantine enechemata, but not identical.[6] In the 8th chapter he also included the fascinating bit that Charlemagne himself had commanded that four more Tones should be added to the existing eight, making a total of twelve.[7]
In the discussion of 15 octave species (chapter VI),[8] Aurelian ascends from the lowest octave of Hypodorian (A—g—a) up to the highest octave a ninth higher which he called "Hyperlydian" (b—aa—bb). Including this conclusion at the end, the whole passage was compiled literally from Aurelius Cassiodorus.[9] This only reference to a triphonic tone system within Carolingian chant theory, also known as the "lesser perfect system" within the Aristoxenian school,[10] was probably the reason for Aurelian's own name as author and compiler of music theory. It proves that the early use of b flat was more influenced by triphonia. The tone system behind the 15 octaves is built in three conjunct ("synemmena") tetrachords (ypodorius—dorius—hyperdorius: A—D—G—c), with another tetrachord below (hypo) and a third one above (hyper).[11] Within triphonia, three species like Dorian (D—c—d defined by the tetrachord tone—half tone—tone), Phrygian (E—d—e defined by the tetrachord half tone—tone—tone), and Lydian were already enough to represent the tone system, as it was needed during the use of b flat. But Cassiodorus' simplification corrupted the Lydian tonus, so that the tetrachords were based on C#—F#—b—e as a kind of transposed Phrygian species, and the Eolian tonus (C—F—♭—e♭) replaced it.
A current matter of controversy is in as much the Musica disciplina belonged to the tradition of the mathematical science music, and in as much it contributed within the Carolingian Renaissance simply as a chant manual called "tonary," which supported the oral transmission of Carolingian reform chant. Music as science had only been revived in the late 8th century by Alcuin, as part of a campaign to revive all of the liberal arts of antiquity, and which was another purpose of the Carolingian Renaissance.
There may have been prior, lost works on music from the late 8th and early 9th centuries; but if so, Aurelian makes no reference to them. In addition, Aurelian made many mistakes interpreting Boethius. Other topics covered in the Musica disciplina include the "music of the spheres," the ethical and moral effects of music, and musical proportions; in addition he includes a narrative about the inventors of music, for example Pythagoras and Jubal.
^It is simply a matter of speculation to assume, whether this notator tried to remember the correct enechema used within Aurelian's school at Réôme or just underlaid the formula according to his school, probably the one of Saint-Amand Abbey. She or he did it only randomly and mainly in the chapter IX which is rather an introduction to the tonary parts of Aurelian's treatise. As the common form is known as a descent through the protus pentachord, the neumes of the "authentus protus" enechema for『NO—NAN—NO—E—A—NE』might be deciphered as『a—G—FE—G—FE—D』and its "plagis"『NO—E—A—NE』or『NO—E—A—GIS』as "DC-D(E)F—G—FE—D" the brackets surround the ornamental note in the middle of a quilisma (Powers, ex. 2).
^In fact, there are two additional tonaries in chapter XVIII and XIX, while already other parts had been identified as later revisions of Aurelian's treatise which already document his influence during the time, when the inventary of the tonary of Metz has been created. For a presentation of the current discussion and datation see Michel Huglo's "Notes" (2011).
^In chapter IX, he asked a Greek about the "meaning" of these intonation syllables (see translation in tonary). It is this chapter with inserted neumes, which attracted the Byzantinist Jørgen Raasted (1988) to study Aurelian's Musica disciplina as a source for Byzantine chant of the 9th century.
^It would not be until the 16th century that the remaining four modes were again defined; this occurred in the DodecachordonofHeinrich Glarean.
^"De musica" as the chapter V, §8 of "De artibus ac disciplinis liberalium litterarum" (Gerbert 1784, i:17-18).
^See Mathiesen's article about Ancient Greece (table 1).
^In general, scholars of Western chant tend to underestimate this oriental influence, because they find no practical use for it and already Cassiodorus' interpretation is based on a misunderstanding—probably of another Latin source, which was nearly as popular as Boethius' music treatise: Martianus Capella's De nuptiis Philologiae et Mercurii (Liber IX De harmonia). Even the reproduction of the wing diagram (taken from Munich, Bayerische Staatsbibliothek, Ms. clm 14629, fol. 220r) could not convince Charles Atkinson (2008, 72), that Cassiodorus' diatonic tropes in chromatic order were based on a diatonic interpretation of the chromatic Iastian and enharmonic Eolian division, so that the Lydian tonus became based on F#. Commentaries by John Scotus Eriugena and Remigius of Auxerre testified the difficulties, that Carolingian philosophers had, when they tried to understand the practical use of temporary changes from the diatonic to the enharmonic or the chromatic genus (Atkinson 2008, 65-84).
Aurelianus Reomensis (1784), "Musica disciplina", in Gerbert, Martin (ed.), Scriptores ecclesiastici de musica sacra potissimum, vol. 1 (Hildesheim 1963 reprint ed.), St Blaise: Typis San-Blasianis, pp. 27–63, archived from the original on 2016-05-30, retrieved 2016-05-13.
Edition based on Valenciennes, Bibliothèque municipale, Ms. 148, ff.57v-89r:
Gushee, Lawrence, ed. (1975). Aureliani Reomensis Musica disciplina. Corpus scriptorum de musica. Vol. 21. Rome: American Institute of Musicology. pp. 53–135.
Alternative edition based on Oxford, Bodleian Library, Canonici misc. 212, ff.40r-48v. 8.38-10.29:
Bellingham, Jane. "Aurelian of Réôme". Grove Music Online. Oxford Music Online. Oxford University Press. Retrieved 25 September 2013.
Glatthaar, Michael (2011). "Bernard von Réome und die Datierung der "Musica disciplina" Aurelians". Revue Bénédictine. 121 (2): 357–381. doi:10.1484/J.RB.5.100458.
Powers, Harold, "Mode, § II Medieval Modal Theory, 2. Carolingian synthesis, 9th–10th centuries", Grove Music Online, retrieved 25 September 2013.
Raasted, Jørgen (1988). "Die Jubili Finales und die Verwendung von interkalierten Vokalisen in der Gesangspraxis der Byzantiner". In Brandl, Rudolf Maria (ed.). Griechische Musik und Europa: Antike, Byzanz, Volksmusik der Neuzeit; Symposion『Die Beziehung der griechischen Musik zur Europäischen Musiktradition』vom 9. - 11. Mai 1986 in Würzburg. Orbis musicarum. Aachen: Ed. Herodot. pp. 67–80. ISBN978-3-924007-77-5.
