Operation Manual

6.59 Pickup 118
frequency varies between 0 and twice the value set with the frequency knob. The feedback knob is
used to fix the amount of “wet” signal re-injected into the delay. Finally, the mix knob determines
the amount of “dry” and “wet” signal sent to the output. When this knob is adjusted in the left
position, only “dry” signal is sent to the output, in its center position (green LED On), there is an
equal amount of “dry” and “wet” signal in the output and in the right position, only “wet” signal is
sent to the output.
Typical Use
The output from a LFO module can be used to control the filtering of a signal (the output of a VCO
for example) with a Phaser module as shown in Figure 65.
Figure 65: Phaser modulated with an LFO module.
A wah-wah effect is obtained by using much feedback. This has the effect of increasing the
peak in the frequency response located between the two notches in the curve. In these conditions
the module acts as bandpass filter.
The default value of the following parameters is set at construction
• frequency: frequency, in Hertz, of the first notch in the frequency response of the filter,
[50,2000] Hertz.
• feedback: coefficient,[0, 1[, determining amount of “wet” signal re-injected into the filter.
If feedback = 0 there is no “wet” signal re-injected while if feedback = 0.99, maximum of
“wet” signal re-injected.
• depth: gain coefficient, [0,1], multiplying the modulation signal.
• mix: amount of “dry” and “wet” signal sent to output. If mix = 0 there is only dry signal
while if mix =1, there is only “wet” signal.
6.59 Pickup
The Pickup module simulates the function of magnetic pickup coils which are used, for example,
in electric guitars and electric pianos. This type of transducer is sensitive to the motion of metallic