Make Noise Black & Gold Shared System Manual page 17

TUTORIALS (cont'd):
Figure 25:
DPO VCO A Sine Wave:
Base Frequency (No Control Voltage Applied)
+5V
-5V
Figure 26:
DPO VCO A Sine Wave:
Exponential Frequency Modulation
+5V
-5V
You should now hear the Sine wave changing
frequency in time with the MATHS Cycle (Figure
26). If you don't hear any change, follow the
line from the EXPO jack to its associated input
Attenuator
, which controls the amplitude of
the CV source as it is applied to the destination.
As you turn it up, the Modulation Depth will
increase, causing greater sweeps in frequency.
The position of the grey FREQuency pot for VCO
A will have a big e ect on the sound, as it sets
the base frequency from which modulation
Figure 25
starts ( ).
Attenuation
To Attenuate a signal is simply to decrease its amplitude.
Attenuating an Audio Signal has the e ect of making the
signal softer/quieter. Attenuating a Control Voltage signal
has the e ect of decreasing the Modulation Depth, reducing
the amount of e ect the source signal has over the
destination.
Examples
DPO has Shape, Angle, and Fold Attenuators, each of which
control the Depth of Modulation to its respective parameter.
For CV input Attenuators, zero amplitude is at full counter-
clockwise and results in no modulation regardless of the
signal input.
Figure 27:
Wogglebug: Random Stepped Voltage
+10V
0V
Time
Figure 28:
Wogglebug: Random Stepped Voltage
(Attenuated by MATHS Ch.2)
+10V
0V
Time
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