In his treatise " Ars cantus mensurabilis " ( " The Art of Mensurable Music " ), written around 1280, he describes a system of notation in which differently shaped notes have entirely different rhythmic values.
परिभाषा
capable of being measured; "measurable depths" पर्याय: measurable,
having notes of fixed rhythmic value पर्याय: mensural, measured,
मोबाइल