Center; Regen - Alesis ModFX Faze Reference Manual

Stereo phase shifter
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3
Using the Faze

Center

The [CENTER] knob changes the center frequency of the Faze's
main filter notch. Its effect varies depending on the mode,
[DEPTH] and [RATE], but in frequency terms, when the
[CENTER] knob is at the 12 o'clock position, you'll hear the
frequency of the phase shift oscillate up and down from the center
frequency. When it's turned full counter-clockwise, the phase
cancellations are in the bass region, and at full clockwise the center
is so high that the filter effect barely makes it into the audible
range.
In CONTRARY STEREO mode, the [CENTER] control is
reversed for the left channel (clockwise rotation puts the
frequency center in the bass region instead of the treble). As each
side has more or less high end, the [CENTER] control may sound
somewhat like a pan pot.
How Center and Depth interact
The modulation section is designed to move the center frequency
around, but at the extreme high or low settings of [CENTER] this
modulation will "bottom out" when the frequency has reached its
limit or moved out of the audible spectrum. For example, at high
settings of [CENTER], you'll usually need to crank up the
[DEPTH] to hear the phasing effect at the high end. When
[CENTER] is set to the bass frequencies, you'll probably want to
turn [DEPTH] down, depending on the range the instrument or
vocal is in.

Regen

The [REGEN] knob changes the amount of positive or negative
feedback (how much output of the phasor is fed back to the
phasor's input).
For no feedback (REGEN off), leave this knob in the center
"12 o'clock" position.
To increase positive feedback, turn [REGEN] clockwise from
center.
For negative feedback, turn [REGEN] counter-clockwise
from center.
At extreme settings in either direction, in some modes the filters
are so sharp they're on the edge of self-oscillation and you'll hear a
hint of an additional tone in the output. Generally, positive
feedback results in a frequency peak about an octave higher than
negative feedback.
28
To he ar ho w CEN TER
wor ks f o r y ours elf , tur n
[ DEPTH] all the way off, an d
m ov e [CENTER] m an ua lly
while listen ing . Tu rn
[ REGEN] up u n til yo u c an
h ea r a ton e, an d ex p er im e nt
with ra ising th e [D EPTH]
c on tr ol at d iffer en t
[ CENTER] s ettin gs .

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