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| | Dolmetsch Online - Music Theory Online - Notes & Rests |
 | | For all notes except the breve (double whole note) and semibreve (whole note), each note has a stem and, for the notes of shorter time-value, a flag, hook or tail (one flag for a quaver (eighth note), two for a semiquaver (sixteenth note), and so on). |
 | | 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. |
 | | In a similar way, the ratio of semibreve and breve was called the tempus which when 2, was said to be imperfect and when 3, was said to be perfect. |
| www.dolmetsch.com /musictheory2.htm (4066 words) |
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