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File:Sub Arturo (In omnem terram) isorhythmic tenor.svg

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English: Structural diagram of the isorhythmic tenor of a late 14th century motet of the Ars Nova, "Sub arturo plebs – fons citharizantium – in omnem terram", by John Aleyn (Alanus), featuring threefold isorhythmic diminution.
  • First staff: preexisting Gregorian cantus firmus melody, from the first antiphon for the first nocturn of the commons for Apostles, "In omnem terram exivit sonus eorum" ('their voice has gone out into all the world'). Melody transposed one fifth up; notes used for the tenor marked in red.
  • Second staff: Isorhythmic tenor as notated in mensural notation. Numbers 1-3 and brackets indicate three rhythmically identical sequences (taleae). The three mensuration signs in the beginning define the pattern of diminution, indicating "tempus perfectum cum prolatione maiore, tempus imperfectum cum prolatione minore and tempus imperfectum cum prolatione minore, respectively. (In the manuscript these signs are in fact found at the end of the line, together with a repetition sign.)
  • Staves 2-5: Abbreviated transcription into modern notation. Each line represents one full repetition of the tenor (color), including the three talea in each, resulting in a nine-part structure. (Within each color, only the first few notes of each talea are rendered here.) The three mensuration signs in the line above correspond to the change in time signatures (9/8, 3/4, 2/4). In each color, the duration of each note is shortened by a factor of 2/3.
Source: Ursula Günther (ed.), The motets of the manuscripts Chantilly, Musée Condé 564 (lim 1074) and Modena, Bibl. estense, α.M. 5,24 (olim lat.568). American Institute of Musicology, 1965. (=Corpus Mensurabilis Musicae 39).
Source Own work
Author Future Perfect at Sunrise

Music typeset with Lilypond, colours edited in Inkscape.


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current15:04, 4 October 2008Thumbnail for version as of 15:04, 4 October 2008616 × 281 (684 KB)Future Perfect at Sunrised'oh.
14:43, 4 October 2008Thumbnail for version as of 14:43, 4 October 2008616 × 281 (684 KB)Future Perfect at SunriseDang it, Mediawiki renderer doesn't do embedded fonts :-(
13:01, 4 October 2008Thumbnail for version as of 13:01, 4 October 2008616 × 281 (657 KB)Future Perfect at Sunrise{{Information |Description={{en|1=Structural diagram of the isorhythmic tenor of a late 14th century motet of the ''Ars Nova'', [[:w:Sub arturo plebs|''"Sub arturo plebs – fons citharizantium �
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