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| | Dolmetsch Online - Music Theory Online - Notes & Rests |
 | | It would appear that prior to mensural notation the length of notes would be determined by the ancient rules of proportional rhythm applied to the words accompanying the melody (prosodic feet and proportions). |
 | | Mensural notation had become, then, a system of rhythmic notation where distinct note-shapes (from about 1260, maxima, longa, brevis and semibrevis - from the fourteenth-century, minima - from the fifteenth-century, semiminima, fusa and semifusa) indicated the relative lengths of different notes. |
 | | In mensural notation (or mensuration), the ratio between the semibreve and the long, called the modus, could be 2 (or duple), in which case it was described as being minor, or 3 (or triple), in which case the ratio was said to be major. |
| www.dolmetsch.com /musictheory2.htm (4772 words) |
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