Yamaha PLG150 Owner's Manual download pdf (Page 10)

Virtual Acoustic Synthesis

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

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Yamaha PLG150 Owner's Manual Page 10