| 11. | Like other calculating devices of the period, the Organum prefigures modern computing technology.
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| 12. | The Organum Mathematicum was a box or chest divided into nine or more compartments.
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| 13. | Anonymous IV mentions L�onin and P�rotin as the best composers of organum and discant respectively.
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| 14. | On folio 81r and 105r we have three early examples of later added florid organum.
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| 15. | On folio 105 recto, a �Benedicamus domino?was notated separately from the florid organum.
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| 16. | This was used to notate organum in two, three and four-voice styles.
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| 17. | BWV 671 is a chorale motet for " organum plenum " and pedal.
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| 18. | The Organum can be thought of as an improved and generalized version of the Arca.
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| 19. | The earliest European sources of information concerning organum regard it as a well-known practice.
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| 20. | Whatever its origin, singing in parallel fifths became commonplace in early organum and conductus styles.
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