Benedetti, Giovanni Battista de, Io. Baptistae Benedicti ... Diversarvm specvlationvm mathematicarum, et physicarum liber : quarum seriem sequens pagina indicabit ; [annotated and critiqued by Guidobaldo Del Monte]

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OPinio Hectoris Euſonij Cypriane mi dilectiſſime, vera non eſt, quod ali
quisrectè
poſſit intelligere rationes conſonantiarum muſicæ, ablque co
gnitione
illarum mediante ipſo ſenſu, imo nemo pont calere theoriam mu
ſices
, niſi aliquo mon verſatus ſit in praxi.
Quando enim cognoſci poterunt
quid
nam ſint diapaſon, diapente, diateſſeron, ditonus, ſemiditonus, hexacordum
maius
, aut minus, & conſonantiæ ex ijs cum diapaſon compoſitæ, abſque earum
praxi
?
vnde ſequetur neque; etiam cognoſci poſſe interualla diſſonantia. Et purus
practicus
non intelliget quid ſit octaua, quinta, quarta, tertia maior, tertia minor,
ſexta
maior, ſexta minor, decima maior, decima minor, vndecima, duode-
cima
, decimatertia maior, aut minor, aut decimaquinta, & aliæ, ita vt ad
comparandam
perfectionem muſicæ neceſſarium ſit, & thęoriam & praxim ad-
diſcere
.
Cum pręterea Ludouicus Folianus apertè monſtrarit (etiam ſi id à diato-
nico
ſintono Ptolomei deſumpſerit) reperiri duos tonos, maiorem, & minorem, id-
eſt
ſeſquioctauum, & ſeſquinonum, & tria ſemitonia, maius, minus, & mini-
mum
, ideſt ſeſquiquintumdecimum, qui eſt maius, ſeſquiuigeſimum quartum id-
eſt
minimum, & mediocre, vt .27. ad .25. quæ proportio ſuperbipartiens vigeſi-
maſquintas
appellatur, & cum cognouerit ſemiditonum conſonantem eſſe ſeſqui-
quintum
, ditonum ſeſquiquartum, & hexachordum minus, vt .8. ad .5. quæ propor-
tio
dicitur ſupertripartiens quintas, & hexachordum maius, vt .5. ad .3. hęc autem vo
catur
ſuperbipartienstertias;
omnium ſimplicium conſonantiarum cognitioni, ex-
tremam
impoſuit manum.
Et quia tibi etiam oſtendere promiſi in modulationibus

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