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Virtual Acoustic Synthesis
10
The Instrument
The key block in this algorithm is the instrument, since it is here that the fundamental tone or “tim-
bre” of the sound is defined. The instrument model consists primarily of a driver — the reed/mouth-
piece, lip/mouthpiece, or bow/string system — and a resonant system corresponding to the tube and
air column or string..
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The sound thus produced is amplified and sustained by the body of the instrument.
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The pitch of the sound is determined by the length of the air column or string, and the timbre is a
complex product of the driving source (reed, lip, air, string), the shape of the resonant cavity, the
materials from which the instrument is made, etc.
One of the remarkable features of the Virtual Acoustic Synthesis system is that just about any driver
can be used with any type of pipe or string.
In all these instruments pressure applied here (the driving point)
causes vibration which results in sound.
Reed vibration
Lip vibration
Air vibration
String vibration
Drivers
Pipes/String