The Effects
41
Phaser
A phaser works by cascading a series of "allpass filters" and then mixing the processed signal with
the input. The allpass filters cause phase shift and at certain frequencies the amount of phase shift
will be exactly out of phase with the input so the mixed signal will have notches at those
frequencies. The Axe-Fx Phaser is extremely powerful allowing from 4 to 12 stages along with a
feedback control for producing even more dramatic effects. Also, the Axe-Fx phase is full stereo
allowing for spatial effects as well.
The Phaser also contains a special “Vibe Mode” that recreates the classic vibe effect with
astonishing accuracy. Set the ORDER control to fully clockwise to activate this mode.
NOTE: The
MIX
control should be set at 50% for the maximum effect.
Basic Parameters
ORDER - Sets the number of stages in increments of two. For classic phaser sounds set the order
to four and use low feedback. For more pronounced effects increase the order. Turning this control
fully clockwise puts the Phaser into “Vibe Mode” where the frequency spacings are fixed. In this
mode the
FREQ SPAN control has no effect.
NOTE: Whenever the order is changed the LFO Type is automatically set to the default. For anything
other than Vibe Mode the LFO Type is set to TRIANGLE. For Vibe Mode the type is set to EXP
(exponential) If you desired a different LFO waveform be sure to check the setting after changing the
order.
RATE - Controls the frequency of the Low Frequency Oscillator. Set fully CCW to sync to the
Global LFO1 oscillator.
DEPTH - Controls the sweep depth of the LFO.
RES - Resonance control. Controls how much of the wet signal is fed back to the input. Increasing
the resonance increases how sharp the notches are. Excessive values of feedback can cause
instability. If this occurs decrease the feedback.
FREQ - Sets the start frequency of the first stage filter. This in combination with the depth control
controls the range over which the notches sweep.
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