Tonality in Raag Music Parag Chordia, Alex Rae Georgia Institute of Technology.
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Transcript of Tonality in Raag Music Parag Chordia, Alex Rae Georgia Institute of Technology.
![Page 1: Tonality in Raag Music Parag Chordia, Alex Rae Georgia Institute of Technology.](https://reader034.fdocuments.net/reader034/viewer/2022051401/5697bfa81a28abf838c99784/html5/thumbnails/1.jpg)
Tonality in Raag Music
Parag Chordia, Alex RaeGeorgia Institute of Technology
![Page 2: Tonality in Raag Music Parag Chordia, Alex Rae Georgia Institute of Technology.](https://reader034.fdocuments.net/reader034/viewer/2022051401/5697bfa81a28abf838c99784/html5/thumbnails/2.jpg)
Objectives
• Introduce a simple theoretical model of tonality for raag music
• Describe series of visualizations of raag space based on pitch-class distributions (PCD)
• Implications
![Page 3: Tonality in Raag Music Parag Chordia, Alex Rae Georgia Institute of Technology.](https://reader034.fdocuments.net/reader034/viewer/2022051401/5697bfa81a28abf838c99784/html5/thumbnails/3.jpg)
Motivation
• Why study tonality cross culturally?
• Is their a common mechanism for the processing of hierarchical pitch structures?
![Page 4: Tonality in Raag Music Parag Chordia, Alex Rae Georgia Institute of Technology.](https://reader034.fdocuments.net/reader034/viewer/2022051401/5697bfa81a28abf838c99784/html5/thumbnails/4.jpg)
What is raag?
E F D C E F A G
D G E F A G E F D C
Ascending: C D G E F A G CDescending: C B A G F G D C
D G G E G F E F
G F E F
Set of motives
Expression
Scale abstraction
![Page 5: Tonality in Raag Music Parag Chordia, Alex Rae Georgia Institute of Technology.](https://reader034.fdocuments.net/reader034/viewer/2022051401/5697bfa81a28abf838c99784/html5/thumbnails/5.jpg)
A simple model of tonality
Short-term memory window
Pitch-detection
Compare with stored schemas
Local PCD
D(X,Y)
![Page 6: Tonality in Raag Music Parag Chordia, Alex Rae Georgia Institute of Technology.](https://reader034.fdocuments.net/reader034/viewer/2022051401/5697bfa81a28abf838c99784/html5/thumbnails/6.jpg)
Visualizing Raag
• Project PCD-based representation of raag onto low-dimensional space using SOM
• How many tonal schemas are there?
• Perceptual distance between raags
![Page 7: Tonality in Raag Music Parag Chordia, Alex Rae Georgia Institute of Technology.](https://reader034.fdocuments.net/reader034/viewer/2022051401/5697bfa81a28abf838c99784/html5/thumbnails/7.jpg)
Empirical Prototype Raag Map
Hameer, Bihag, Khamaj, Yaman
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Empirical Segment-based
Desh, Bihag, Khamaj, Yaman
![Page 9: Tonality in Raag Music Parag Chordia, Alex Rae Georgia Institute of Technology.](https://reader034.fdocuments.net/reader034/viewer/2022051401/5697bfa81a28abf838c99784/html5/thumbnails/9.jpg)
Sub-raag structure (Malkauns)
Three distinct clusters
![Page 10: Tonality in Raag Music Parag Chordia, Alex Rae Georgia Institute of Technology.](https://reader034.fdocuments.net/reader034/viewer/2022051401/5697bfa81a28abf838c99784/html5/thumbnails/10.jpg)
Discussion
• Visualizations suggest:
– number of schemas less than number of nominal raags
– sub-raag and super-raag (thaat) levels may be encoded (Castellano et al.)
• Are representations of raag-schemas instance based or model based? Does this change with exposure?
• Experimental work using reaction-time paradigm