Yamaha PLG150-AN Owner's Manual page 9

Analog Physical Modeling Synthesis and the PLG150-AN Tone Generator
Edge
This useful parameter lets you make fine, subtle
changes to the waveform. Higher Edge values pro-
duce a sharper waveform, resulting in a harder,
harsher sound with many harmonics. Reducing the
value makes the waveform rounder, producing a
Sharp-edged Slightly rounded Sine wave
softer, warmer sound. (At the minimum value, this
waveform edges
actually results in a sine wave.)
Oscillator Sync
Oscillator Sync is another common function in analog synthesis that synchronizes one oscillator's
waveform with that of another oscillator.
In the illustration below, the waveform of oscillator 1 is constantly reset so that it starts its wave cycle
at the same phase point (the first position of the wave cycle) as oscillator 2. As a result, the waveform
of oscillator 1 becomes more complex than normal, adding harmonics to the sound. (In the illustra-
tion below, the sound of oscillator 1 becomes brighter than what it would be originally.)
Here, oscillator 1 is referred to as the "slave" oscillator, while oscillator 2 is called the "master."
Changing the pitch of the master oscillator changes the pitch of the overall sound. On the other hand,
changing the pitch of the slave oscillator changes the timbre or tone of the overall sound by altering
the amount of harmonics.
Oscillator 2 (master)
Oscillator 1 (slave)
Just as with conventional analog synthesizers, the PLG150-AN allows you to synchronize the oscilla-
tors of VCO 1 and VCO 2. What's more, it allows you to use Oscillator Sync with only VCO 1, since
VCO 1 actually has two oscillators by itself.
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