Yamaha VL1 Owner's Manual page 53

Getting Started
Referring to the block diagram of the harmonic enhancer, above, we can see that it
employs a modulation approach to building new harmonic structures. The carrier and
modulator blocks have independent display pages and some independent parameters.
The Modulator Parameter Page
The Carrier Parameter Page
NOTES If you want to experiment with the Harmonic Enhancer parameters
while reading this section, they can be accessed by selecting the EDIT mode
and, from the initial EDIT mode display (try pressing ] if the initial EDIT
display doesn't appear), pressing ™ (" E1 ") to select the Element 1 parameters,
then pressing £ (" Modi ") to select the Modifier parameters, and finally moving
the cursor to " 1:Harmonic Enhancer " and pressing [ . Once the
Harmonic Enhancer display is selected the carrier and modulator pages are
selected via ¡ (" Crr ") and ™ (" Mod "), respectively.
The "Signal Select" parameters in these pages allow independent selection of
the six different signal sources listed below.
This is the total output of the instrument model: a mix of the driver,
Normal
pipe/string, and tap signals.
This signal represents the instantaneous amplitude of the breath noise
Breath Noise
produced at the driver. It is basically a highly distortion version of the
Amplitude
Slit/Friction signal described below.
When the pressures on either side of an aperture (e.g. a mouthpiece/
reed assembly) differ, a corresponding flow of air is produced. There is,
Flow Rate
however, a limit to the speed of the airflow which can be produced
Saturation
(saturation). The relationship between the pressure difference and
resulting airflow is derived as the Flow Rate Saturation signal.
The beat signal represents contact between the vibrating reed and the
Beat
mouthpiece.
As the reed vibrates, the area of gap (slit) between it and the mouth-
Slit/Friction piece varies accordingly. The Slit/Friction signal corresponds to the
varying area of the reed/mouthpiece slit.
Reed This signal is derived directly from the flexing of the reed.
Mixing & The Modifiers
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