Computational analysis of Seyir - Pompeu Fabra...
Transcript of Computational analysis of Seyir - Pompeu Fabra...
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Computational analysis of Seyir
Barış Bozkurt, Nilgün Doğrusöz Dişiaçık
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THE MAKAM CONCEPT
Powers, 1980
Built with certain ajnas that consist of certain pitches, degrees and intervals, ”makam” is defined as a melodic structure that is formed by starting from certain notes, following a certain melodic direction, stopping at certain pitches and finally staying on a certain pitch. (Yalçın Tura)
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Makam Features Scale, intervals and intonation of specific notes in the
scale (intervalic structure) Overall melodic progression
(ascending, descending, etc.) Typical phrases, emphasis on certain scale degrees Hierarchy of tones and their frequency of occurrence
in a piece, karar, güçlü, yeden, etc.
Seyir
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Cem Behar, Saklı Mecmua, YKY, İstanbul, s.142 Turc 292 yazmanın 179b sayfasında dört makamda (Hüseyni, Dügah , Neva ve Bayati) seyir örnekleri
Ali Ufkî (1610-1675)
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Uşşak-Beyati-Isfahan
Hüseyni – Muhayyer - Gülizar
SCALES (single octave)
Discriminating features for makams with the same scale are mainly the seyir characteristics. We want to be able to track those characteristics on data.
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Ascending: begins around the tonic, gradually rises to the dominant, and eventually returns to the same tonic. Descending begins around the upper tonic, descend to the dominant and finally make a cadence on the tonic. Ascending-descending direction begins around the dominant, then explores the regions both above and below that point before making another stop on the same tonal center, and then proceeds to the final cadence on the tonic.
ascending(cikici)ascending(cikici)
descending(inici)
descending(inici)
ascending-descending(inici-cikici)
ascending-descending(inici-cikici)
Main categories for the overall melodic progression
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Pitch hierarchy can be studied with pitch histograms
Segah
Dügah
Neva
Çargah
Hüseyni
Muhayyer
A4 C5 D5 E5 G5 A5
Time dimension is lost in histogram
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Analysis of the overall progression for a collection of data Scores
Resampling
…
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0 2 4 6 8 10 12 14 16 18 20290
300
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380Rast
Time (percentage)
Rela
tive
Freq
. (H.
Com
mas
)
Long term melodic progression analysis
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Time (percentage)
Rela
tive
Freq
. (H.
Com
mas
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0 2 4 6 8 10 12 14 16 18 20290
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380Muhayyer
Time (percentage)
Rela
tive
Freq
. (H.
Com
mas
)
Ascending-descending
Mid-range progression Ascending
Descending
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Overall histogram
Number of files
International naming Perde names
Time index Pitch/interval info
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Hüseyni (57 eser) Muhayyer (45 eser)
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Bestenigar (8 eser) Saba (27 eser)
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Uşşak (72 eser) Beyati (26 eser)
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Mesauring progression on audio signals
Uşşak
Hüseyni
Muhayyer