Boethius, De institutione arithmetica libri duo · De institutione musica libri quinque, ed. Gottfried Friedlein (Leipzig: Teubner, 1867) — read from page images, with the critical apparatus separated from the text

Open to allBoethius · Guido Aretinus438 segments · 520 pp

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page 356

p. 33814. | dum mesenque ponamus, subtracto scilicet synemmenon tetrachordo, erunt -XV. nervi. At si ab his proslambano- menos detrahatur, erunt -XIIHI. Hi ergo disponantur hoc modo. Sit -A- hypate hypaton, -B- parhypate hypaton, 5-C. hypaton liehanos, -D. hypate meson, .E. parhypate meson , -F- lichanos meson, -G- mese, -H- paramese, .I- trite diezeugmenon, -K- paranete diezeugmenon, -L- nete diezeugmenon, -M- trite hyperboleon , -N. paranete hyper- boleon, -O- nete hyperboleon. Ab hypate igitur ad para- 10 mesen diapason consonantia est, ab eadem vero paramese ad hypaten meson diapente, a mese vero ad hypaten me- . son diatessaron. Erit igitur diapason quidem octo chor- darum, diatessaron vero quattuor, diapente autem quinque. Ác per hoc habebit diatessaron quidem species tres,, dia- 15 pente autem species quattuor, diapason vero species septem; semperque una minus species erit, quam fuerint voces. Ut enim a mese ceteras ordiamur, diatessaron con- sonanliae species sunt tres hoc modo. Una quidem species erit ab -G- ad -D., secunda vero ab -F- ad -C., tertia ab 20 -E- ad -B- et hue usque diatessaron species progrediuntur | ideirco, quia huc usque species binos continent nervos eiusdem diatessaron, ut -GD- quidem eos, qui sunt -E-F., . et -FC- eos, qui sunt -E-D., et -EB-, eos, qui sunt -C.D- Si vero his adiecero diatessaron -DA- diversa erit ab ea, quae 25 est -"GD.; unum enim solum .:GD- consonantiae nervum continebit, id est .D- solum. Excessit igitur -GD- con- . sonantiam. Atque ideo diatessaron tres species habere perhibetur. Et in ceteris quidem consonantiis idem est.

Commentary
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