Guido d'Arezzo

Guido d'Arezzo
Guidonian /gwi doh"nee euhn/, adj.
/gwee"daw dah rddet"tsaw/, (Guido Aretinus) ("Fra Guittone")
c995-1049?, Italian monk and music theorist: reformer of musical notation.

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born с 990, Arezzo?
died 1050, Avellana?

Italian music theorist.

A Benedictine monk charged with training the choristers in the cathedral of Arezzo, he is credited with two important advances: the invention of the staff for notating exact pitches, and the use of different syllables to sing each pitch, or solmization. In his famous Micrologus (1026–33), he describes the use of at least a two-line staff and the use of syllables as a mnemonic device for singing musical pitches. The famous "Guidonian hand," an aid to modulation from one hexachord to another by using the joints of the hand to represent different pitches, is not mentioned in his extant writings.

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▪ Italian musician
also called  Guido of Arezzo  
born c. 990, Arezzo? [Italy]
died 1050, Avellana?
 medieval music theorist whose principles served as a foundation for modern Western musical notation.

      Educated at the Benedictine abbey at Pomposa, Guido evidently made use of the music treatise of Odo of Saint-Maur-des-Fossés and apparently developed his principles of staff notation there. He left Pomposa in about 1025 because his fellow monks resisted his musical innovations, and he was appointed by Theobald, bishop of Arezzo, as a teacher in the cathedral school and commissioned to write the Micrologus de disciplina artis musicae. The bishop also arranged for Guido to give (c. 1028) to Pope John XIX an antiphonary he had begun in Pomposa.

      Guido seems to have gone to the Camaldolese monastery at Avellana in 1029, and his fame developed from there. Many of the 11th-century manuscripts notated in the new manner came from Camaldolese houses.

      The fundamentals of the new method consisted in the construction by thirds of a system of four lines, or staff, and the use of letters as clefs. The red F-line and the yellow C-line were already in use, but Guido added a black line between the F and the C and another black line above the C. The neumes could now be placed on the lines and spaces between and a definite pitch relationship established. No longer was it necessary to learn melodies by rote, and Guido declared that his system reduced the 10 years normally required to become an ecclesiastical singer to a year.

      Guido was also developing his technique of solmization, described in his Epistola de ignoto cantu. There is no evidence that the Guidonian hand, a mnemonic device associated with his name and widely used in the Middle Ages, had any connection with Guido d'Arezzo.

      Guido is also credited with the composition of a hymn to St. John the Baptist, Ut queant laxis, in which the first syllable of each line falls on a different tone of the hexachord (the first six tones of the major scale); these syllables, ut, re, mi, fa, sol, and la, are used in Latin countries as the names of the notes from c to a (ut was eventually replaced by do). His device was of immense practical value in teaching sight-reading of music and in learning melodies. Singers associated the syllables with certain intervals; mi to fa, in particular, always represented a half step.

      Before Guido an alphabetical notation using the letters from a to p was used in France as early as 996. Guido's system used a series of capital letters, small letters, and double small letters from a to g. Guido's system also came to be associated with the teaching of the gamut—the whole hexachord range (the range of notes available to the singer).

      In addition to his innovations Guido also described a variety of organum (adding to a plainchant melody a second voice singing different pitches) that moved largely, but not completely, in parallel fourths. Guido's work is known through his treatise the Micrologus.

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Universalium. 2010.

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