relation of 10:6 being really close to 3:2. Nonetheless, this is not the only way that there is a 3:2 relation in this part. Between the main harmony of each section and the repetition there is also a relation close enough to 3:2. Though the Missa Prolationum is one the Ockeghem’s composition in which the relation with mathematical ratios is seen, Ockeghem, and the Renaissance composers in general, are famous and known nowadays for having a strong affection towards the use of these ratios when it