OUTLINE Introduction Background Dataset Context Analysis Methodology

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Presentation transcript:

Towards the Tangible: Microtonal Scale Exploration in Central-African Music

OUTLINE Introduction Background Dataset Context Analysis Methodology Tarsos Demo Conclusions & Opportunities

INTRODUCTIONBACKGROUND Research 'team' based at the School of Arts Ghent in Belgium: Joren Six, Computer Scientist Olmo Cornelis, Musicologist & Composer We approach ethnomusicology with a computational approach: Computational Ethnomusicology[1]

INTRODUCTIONDATASET Digitization project “Digitization of the Ethnomusicological Sound Archive of the Royal Museum for Central Africa” resulted in: Audio: 50.000 sound recordings – 3.000 hours of music - 33.000 items digitized. Contextual Meta-data : 35.000 items digitized Development of a website: http://music.africamusem.be Preliminary exploration of MIR-techniques.

INTRODUCTIONDATASET

INTRODUCTIONCONTEXT ANALYSIS Goal of our current research project: Provide culture independent access to archives with ethnic music that deal with a large variability of musical content, users, search intentions and expectations in a multidisciplinary approach, combining musicology and computational means.

INTRODUCTIONCONTEXT ANALYSIS Opportunities Document musical diversity New Comparative Musicology [Steven Brown] Spot trends and influences Use interesting features in new compositions

METHODOLOGY Develop a method yielding culture independent views on musical parameters by using or adapting existing signal processing MIR-techniques. This idea is implemented in the software package Tarsos[5]: An easy to use, open system to extract and explore pitch organization in musical audio for scientific, educational and artistic purposes. Temporal and timbral features follow

METHODOLOGYTARSOS BLOCK DIAGRAM

METHODOLOGYTARSOS BLOCK DIAGRAM

METHODOLOGYTARSOS BLOCK DIAGRAM

METHODOLOGYTARSOS BLOCK DIAGRAM

METHODOLOGYTARSOS BLOCK DIAGRAM

METHODOLOGYTARSOS BLOCK DIAGRAM

METHODOLOGYTARSOS BLOCK DIAGRAM

METHODOLOGYTARSOS BLOCK DIAGRAM

METHODOLOGYTARSOS BLOCK DIAGRAM MIDI Tuning Dump

TARSOSDEMO

TARSOSPitfalls What is a note?

TARSOSPitfalls What is a note?

TARSOSPitfalls What is a tone scale?

TARSOSAPI Scripting API: Search for pitch intervals Tone scale (makam, raga) recognition Audio fingerprinting [4] Scripting possible with any JVM language: Scala Groovy Jython ...

CONCLUSIONS Tarsos delivers: Scientific data - Historical temperaments. - African tone scales are becoming more western like[3] Artistic input e.g. experimentation with microtonal compositions. Educational opportunities: improve intonation.

DISCLAIMER Audio alone might not be sufficient to describe and/or retrieve ethnic music: What does it mean to search and retrieve music from a culture where the word “music” exists only in connection to body movement, smell, taste, colour. The idea of separating sound from the rest of its physical environment (movement, smell, taste, colour) may well be a weird “invention” of the West. We cannot understand ethnic music correct without its social function and context![2]

CONTACT joren.six@hogent.be olmo.cornelis@hogent.be http://tarsos.0110.be http://music.africamuseum.be

References [1] G. Tzanetakis, A. Kapur, W. A. Schloss, M. Wright. Computational Ethnomusicology. Journal of Interdisciplinary Music Studies, 2007. [2] Access to ethnic music: Advances and perspectives in content-based music information retrieval - Cornelis, O., Lesaffre, M., Moelants, D. & Leman, M. Apr-2010 In : Signal Processing. 90, 4, p. 1008-1031. 24 p. [3] Moelants,D.,Cornelis,O.,Leman,M.:Exploring african tone scales. Proceedings of 9th ISMIR Conference (2009) [4] Six, J. & Cornelis O. A Robust Audio Fingerprinter Based on Pitch Class Histograms - Applications for Ethnic Music Archive, Proceedings Folk Music Analysis conference 2012 [5] Six, J. & Cornelis, O., Tarsos - a Platform to Explore Pitch Scales in Non-Western and Western Music, 24-Oct-2011 Proceedings of the 12th International Society for Music Information Retrieval Conference, ISMIR 2011.

MAKAM RECOGNITION

MAKAM RECOGNITION

MAKAM RECOGNITION

MAKAM RECOGNITION