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Use of physical-model synthesis for developing experimental techniques in ethnomusicology- The case of the Ouldémé flute

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article
 

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Use of physical-model synthesis for developing experimental techniques in ethnomusicology- The case of the Ouldémé flute
 

Nom(s)

De la Cuadra, Patricio (auteur)
 
Vergez, Christophe (auteur)
 
Causse, René (auteur)
 

Publication

2002
 

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Résumé

As part of a collaboration project with ethnomusicologists and the Acoustique instrumentale group at IRCAM, we have studied and implement a physical model of flue instrument. The model has been investigated regarding its flexibility to geometry changes in the instrument, possibilities of timbre control as well as playability of the model. Two implementations have been developed: a C++ object using STK library and an external object for MAX/MSP. Implementations have been designed allowing the user to adjust many parameters in real time and evaluate the response of the model. Also a maximum-likelihood algorithm has been implemented to automatically adjust the parameters of the model to a desire timbre. Finally a real-time MIDI controller has been built to control the model. Our goal is to study the musical scales of the flutes played by a tribe from North Cameroon: the Ould'em'e. Each musician normally plays two flutes and also sings a melody while inhaling. A band is usually formed by five players producing complex melodic and rhythmical textures. The flutes don't have toneholes and they are made of bamboo cane with a blowing end at one side and a close end at the other. These flutes operate with a turbulent jet flow. The behavior of this type of jet is less understood than the laminar one (case of recorder like instruments) and it is currently being studied in a parallel project. A one dimensional representation of the dynamics of the jet (formation, velocity fluctuation, oscillations) is used as described in Vergez These. The bore is modeled using one dimensional waveguides. Visco-thermic losses and radiation of the sound are implemented as linear filters.
 

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Contribution au colloque ou congrès : ICMC (expected)
 

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2006-03-14 01:00:00
 

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