Waveguide based modeling of strings

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Dr. Fiala Péter
Department of Networked Systems and Services

Waveguide model for strings

Creating musical sounds is one of the basic aspirations of people. A common method of sound production is to use stringed instruments.

Some of the key determinants of the string are its material characteristics and the excitation mode (striking, picking, using a bow). The different tones are based on these parameters, so we need different strings to achieve diverse tones.

It has always been a need to be able to create many different sounds using only one instrument, which led to stringed instruments like the guitar or the piano that has more than one string.

But – of course – physical size limits occurred.

Sound synthesis came as a solution: to be able to create the sound without the presence of the real vibrating system.

Beside the traditional sound synthesis methods in which we try to simulate the tone itself, physical-based models are becoming more common. This means that you are modeling the vibrations of the sound, based on the unequivocal relations between the physical parameters of the string and the vibration, and the sound itself.

The most widely used physical model-based synthesis of the string is called waveguide modeling.

Using this method, in my thesis I describe the realization of modeling the vibrations of a string excited by striking, so the sound of the piano string can be synthesized.


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