Sonic Charge Permut8 - Manual (Page 9)

Analog Section
INPUT LEVEL
INPUT LEVEL is applied before anything else, including the soft clipper, the limiter
and converting to 12-bit sample data. If you turn INPUT LEVEL very low you will in-
troduce a lot of quantization noise, i.e. "bit crushing"
(compensate with a high OUT-
PUT LEVEL)
. If you turn the level high you will either get a lot of distortion or make
the limiter work harder and obtain a more compact sound.
The soft clipping algorithm in
Permut8
has very low aliasing in itself, so you can use
it as an analog distortion module. Turn up CLOCK FREQ to maximum for the least
amount of digital noise.
LIMITER
The LIMITER switch enables the built-in
"brick-wall" limiter. The limiter has a fixed
threshold and reaction time, but it is placed
after the input gain adjust. Thus the INPUT
LEVEL will determine the amount of volume
compression. The limiter is also placed in-
side the feedback loop and with proper bal-
ancing of INPUT LEVEL and FEEDBACK
AMOUNT you can make the feedback signal
"duck" when there is audio input
(creating a
less busy sound) . If you turn FILTER
PLACEMENT to IN, the filter is applied be-
fore the limiter. You can then tweak FILTER
FREQ and MIX to compress only the low or
high-end of the audio signal.
FILTER FREQ
FILTER FREQ determines both the filter
mode and its cutoff frequency. The left half of
the knob puts the filter into lowpass mode
while the right half puts it into highpass
mode.
FILTER PLACEMENT
Turn the FILTER PLACEMENT dial to choose where in the signal chain you want to
apply the filter. The OFF setting disables it entirely. The IN setting puts it before the
soft clipper / limiter, but still inside the feedback loop so that each successive itera-
tion of the feedback signal will become increasingly filtered. The FB
("feedback")
set-
ting places it on the feedback signal only while OUT applies the filter to the final out-
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