Yamaha VP1, Руководство пользователя

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BASICS
Chapter 3 Learning the Basics
Sound Production
Sound Production
F/VA Sound Synthesis
As you know, the VP1 uses VA (virtual acoustic) synthesis to produce sound. To be
more precise, Yamaha has developed two different VA methods, each designed to
model a particular range of instruments. The VP1 employs the F/VA (free-oscillating
VA) method, which provides truer modeling of instruments that are played by striking
or plucking of strings. In contrast, Yamaha’s VL1 synthesizer adopts an S/VA (self-
oscillating VA) approach more suited to modeling of wind and bowed-string
instruments.
FYI
• F/VA and S/VA systems are fundamentally different and incompatible. Data and parameters
cannot be moved from one system to another.
Physical Characteristics of Struck-String Instruments
The following drawing illustrates the sound system on a struck- string instrument such
as a guitar.
The next illustration shows how the impact to the string propagates over time.
The F/VA approach generates models based on the vibrational system described
above.
Now let’s look more closely at the “driver” and “string” components mentioned
above.
Fixed end Fixed end
Vibrating area (String)
Driver (Vibration applied here)
1. Performer
’
s strike
2. Propagates
3. Hits end point, attenuates,
reverses 5. Hits end point, attenuates,
reverses.
4. Propagates
6. Propagates