ìOn
the Relative Influence of Even and Odd Harmonics in the Clarinet Timbreî
International Computer Music Conference
Barcelona, September 5-9, 2005
10 sounds have been generated
with the model in order to point out changes in the soundís timbre which occur
in a beating-reed situation.
For that purpose we used the
following control parameters:
- The dimensionless mouth pressure
Gamma increases from 0.40 to 0.50.
- The fundamental
frequency of the bore has been set to 170 Hz.
- The dimensionless
parameter characterizing the embouchure Zeta has been set to 0.33.
- The reed
resonance frequency has been set to 2500 Hz.
The sampling
frequency has been set to 44.1 kHz and the number of samples is 32768.
All the sounds have
been equalized in loudness according to the Zwicker loudness model (ISO 523B)
in order to avoid perceptual variations of timbre due to loudness.
Please click on the link below
to download a file (wav file).
Gamma |
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Non beating-reed situation |
Beating-reed situation |
Notice the change in the
soundís timbre when Gamma is greater than 0.47, which corresponds to the
beating-reed case. One reason why the timbre becomes much brighter is the
increase of high frequency even harmonics due to the closure of the mouthpiece.