Anno 1252, Safi al-Din genus notationis musicae excogitavit ubi rhythmi a signis geometricis effinguntur. Multi eruditi posteriores repraesentationes rhythmorum petiverunt evolvere graphicas geometricas. Simile systema geometrica divulgatum est anno 1987 a Kjell Gustafson, cuius ratio rhythmum effingit ut tabula graphica (Anglice: graph) duobus dimensionibus.[1]
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