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14. PRESENCE
Use this to adjust the overall brightness and punch of
the output signal. The adjustment range is determined
by the USA/UK button.
15. EFX
This button toggles all the effects on and off simulta-
neously. When the effects are active, the LED above the
EFX button lights.
HPF Freq: Each of the following effects has a high-
pass filter with an adjustable frequency control. This
determines the low-frequency cutoff of the filter, with a
range from 20 Hz to 20 kHz.
16. MODULATION
This control adjusts the amount of the currently
selected modulation effect that is mixed into the input
signal. Press the TYPE button above the Modulation
control to view the currently selected modulation effect
in the display. Rotate the Select/Adjust knob [22] next
to the display to change the modulation effect.
Chorus
The chorus effect simulates the sound of more than
one instrument playing the same passage. When two
people play the same part in unison, they are never
exactly the same, so the chorus effect "modulates" the
timing and pitch of the "chorused" signal.
Press the Select/Adjust knob to modify the following
parameters for the chorus effect:
Depth: The depth control adjusts how much the delay
of the chorused signal changes over time by the Rate
control (see next). The Depth control also affects the
pitch of the chorused signal; the more depth that is
applied, the more pitch modulation. This control has a
range from 0 ms to 10 ms in 0.1 ms steps.
Rate: This control adjusts the rate at which the delay
applied to the chorused signal varies, ranging from 0.08 Hz
to 8 Hz in 0.01 Hz steps.
Voicing: There are three voice settings available; Mono,
Stereo1, and Stereo2. The stereo settings are more obvi-
ous when listening to headphones, stereo line outputs, or
recording via the USB connection. Normally, you will use
the Mono setting when listening through the amp.
•
Mono — the left and right channels are the same.
•
Stereo1 — adds a slight phase shift between the
left and right channels, adding a bit more move-
ment to the sound.
•
Stereo2 — shifts the phase 180 degrees between the
left and right channels for a more dramatic difference.
Flanger
The flange effect is very similar to the chorus effect,
with Depth and Rate controls that operate as described
for the chorus effect. In addition, it also has a Feedback
control (described below). A flanger typically has a short
depth time, which creates the characteristic "whooshing"
sound often used to describe the flange sound.
Feedback: This controls the amount of the flanged
signal that is routed back to the input of the flanger.
This changes the sound of the flange effect by adding
even more comb filtering to the signal. It ranges from 0%
to 100% in 1% steps.
Phaser
A phaser is similar to a flanger, except that instead of
using delay to create the effect it uses a filter to alter
the phase response of the "phased" signal, which is
mixed back into the original signal. It has the same con-
trols as the flanger, except instead of a feedback control,
it has a center control.
Center: This control adjusts the center frequency of
the filter, which is where the "notch" occurs in the comb
filtering. It ranges from 20 Hz to 20 kHz in variable steps.
Tremolo
The tremolo guitar effect has been around a long
time, and is simply described as amplitude modulation,
or cyclic change in volume. The tremolo effect has two
parameters you can adjust, rate and waveform.
Rate: This adjusts the rate at which the amplitude of
the signal is modulated, ranging from 0.08 Hz to 8 Hz in
0.01 Hz steps.
Waveform: This changes the character of the ampli-
tude modulation by affecting how the volume changes
the signal. You can select from Sine, Hypersine, Square,
Triangle, and SawTooth.
Rotary
The rotary effect simulates the sound of a rotary
speaker, similar to the famous Leslie speaker sound. It
is similar to the tremolo sound, but includes the Doppler
effect as well (the Doppler effect is the apparent change
in frequency as a sound approaches or recedes). There
are two rotary speeds you can program, a low speed and
a high speed. If you have the PB1 footpedal, you can use
the pedal to change between the low speed and the high
speed. Otherwise, you can select whether you use the low
speed or the high speed using the Select/Adjust knob.
Low Speed: This sets the speed at which the speaker
sounds like it is rotating when the low rate of speed is
selected. It ranges from 0.08 Hz to 10.00 Hz in 0.01 Hz
steps.
Owner's Manual
11
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