Question

Formula of the ratio and its prolation

Answer 1

Prolation

Prolation is a term used in the theory of themensural notation of medieval andRenaissance music to describe its rhythmic structure on a small scale, as opposed totempus, which described a larger scale. The term "prolation" is derived from the Latinprolatio, first used by Philippe de Vitry in describing Ars Nova, a musical style that came about in 14th-century France.

Prolation, together with tempus, corresponds roughly to the concept of time signature in modern music. Prolation describes whether a semibreve (whole note) is equal in length to two minims (half notes) (minor prolation or imperfect prolation; in Latin "prolatio minor") or three minims (major prolation or perfect prolation; in Latin "prolatio maior"). Tempus similarly describes the relationship between thebreve and semibreve.