Depth; Phreeq - Alesis ModFX Reference Manual

Depth

The [DEPTH] knob controls how much modulation will be
applied to the filter frequency. Turn the knob clockwise for a
deeper effect. Turning [DEPTH] all the way counter-clockwise
turns modulation off completely, leaving the filter fixed at the
[PHREEQ] position. Depth interacts with the [PHREEQ]
control (see next page).

Phreeq

The [PHREEQ] knob changes the corner frequency of the
Philtre's high pass and low pass filters, and the center frequency
of the band pass and band stop filters. Its effect varies depending
on the filter type, the setting of the [STEEP] switch, and the
[REGEN] control, as will be explained later.
LOW PASS: Frequencies above the [PHREEQ] setting will be
rolled off. Turn clockwise to let more high end through.
HIGH PASS: Frequencies below the [PHREEQ] setting will be
rolled off. Turn counter-clockwise to let more low end
through.
BAND PASS: Frequencies above and below the band centered at
the [PHREEQ] setting will be rolled off. The width of the
band is set by the [REGEN] control; if [REGEN] is at
minimum the bands are so far apart that moving [PHREEQ]
may not have an audible effect except near the maximum or
minimum settings.
BAND STOP: Frequencies within the band centered at the
[PHREEQ] setting will be rolled off. Again, the width of the
band is set by [REGEN]: at the minimum setting, almost the
entire audio range may be rolled off, and at the maximum
setting only a narrow notch.
Using the Philtre
U nlik e s om e o th er e ffe cts ,
[ DEPTH] in th e Ph iltre
d oe sn 't de cr e as e th e a mo u nt
o f filte re d s ig na l in th e m ix ;
tha t' s a c on s ta nt. In ste ad , it
c on tr ols h ow mu ch th e
fre qu en c y of th e filte r will be
m ov ed u p a nd do wn b y the
m od ulation s o ur ce .
To he ar ho w PHREEQ
wor ks f o r y ours elf , tur n
[ DEPTH] all the way off, an d
m ov e [PH REEQ ] m an ua lly
while listen ing . Tr y all fou r
filte r typ es . Tu rn [REG EN]
u p un til y ou ca n he a r a ton e,
a nd e xp e rime n t with ra is ing
the [ DEPTH ] c on tr ol at
d iffe re n t [PH REEQ ] s ettin gs .
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