The fourth way is only excepted against, where the fift rising into the eight, and in few parts it cannot well be admitted, but in Songs of many Voices it is oftentimes necessary.
The passage also of perfect Concords into imperfect, either rising or falling, by degrees or leaps, is easie, and so a Unison may pass in∣to a lesser third, or a greater third; also into the lesser sixt, but seldom into the greater sixt. A fift passeth into the greater sixt, and into the lesser sixt; as also into the greater or les∣ser third; and so you must judge of their eights, for de octavis idem est judiciem; and therefore when you read an Unison, or a fift, or a third, or a sixt, know that by the simple Concords the Compounds are also meant.
Note here, that it is not good to fall with the Bass, being sharp in F, from an eight unto a sixt.
As thus: Or thus. 〈♫〉〈♫〉 〈♫〉〈♫〉 But concerning imper∣fect Cords, because they observe not all one way in their passages, we will speak of them severally, first declaring what not harmonical doth signifie, whereof mention will be made hereafter.
Relation, or reference, or respect not har∣monical,