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t. I (PL 63)

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In triplici quoque dispositione, simul diapente et<br />

diapason symphonia componitur, servans sesquialteram<br />

et dupiioem rationem: quod subjecta descriptio<br />

docet.<br />

Sesquialtera Duplex<br />

Diapente Diapason<br />

Ti-iplex<br />

Diapente et diapason.<br />

Et quoniam triplus duas continet consonantias, dia-<br />

pente scilicet, et diapason, in hujus triplicis posi-<br />

tione in dillerentiis eumdem rursus triplum reperiemus,<br />

secundum subter descriptum modum.<br />

Triplus diapente et diapason.<br />

DE ARITFIMETICA I.IB. H.<br />

A<br />

B<br />

I<br />

:f<br />

XBriimii.<br />

In triplioibus quoque extremitatibus, major differen-<br />

tia ad minorem differentiam quadrupla est, et bis<br />

diapason symphoniam eniittit. Namque in disposi-<br />

tione 2, 3, 6, estremorum differentia est, id est se-<br />

narii et binarii, 4 ; minor vero differentia, id est<br />

ternarii et binarii, unus ; 4 aulem uno quadrupla<br />

major est relatione , quae comparatio bis diapason<br />

consonantiam tenet.<br />

Quadruplu.s bis diapason.<br />

i.i<br />

I

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