Section 4 - Algorithms
VAN DER POL FILTER
128
00
- VandrPol Filter
adds
synthetic
high
harmonics to the
input
signal, brightening
the
overall
sound
. This
newly
designed algorithm is
most
often
used
in
the
studio
for vocalists,
but
feel free
to experiment
with
this algorithm
using
your
favorite
instrument
as well. This algorithm features
prominent
transient enhancement which
makes
it
ideal for
"plucked"
sounds. The filter
in
this
algorithm operates
on
the
signal
prior
to enhancement. Set
the
filter to enhance the frequency
region
that
you desire. Then mix the
enhanced
signal
with
the
dry
signal.
The parameters available for the
VandrPol Filter are:
01-
Mix
02-Volume
See the descriptions
under
the Mix
and
Volume Parameters,
in
the
beginning of this section. For
this algorithm,
we
recommend
mid
values of
the
Mix.
03 - HighPass Fc Range: 4 to 8000 Hz
Controls the boost or
cut
of the
high
pass filter frequency
applied
to the
input
signal.
04 - LowPass Fc Range: . 100 Hz to 16 KHz
Controls the boost or
cut
of the low
pass
filter frequency
applied
to the
input
signal.
05 - Filter Gain
Range:
-48
to +48 dB
Because the cascade of
high
pass
with
low
pass
causes
an
insertion loss, this
parameter
allows
you
to boost the filtered
output
signal.
06 -
Mod1
Source
07 -
Mod1
Destination Parameter
08 -
Mod1
Param Range Min
09 -
Mod1
Param Range Max
10 - Mod2 Source
11
- Mod2 Destination Parameter
12 - Mod2 Param Range Min
13 - Mod2 Param Range Max
See the descriptions
under
the Algorithm
Modulators
in
the
beginning
of this section.
ENSONIQ DP/4 Musician's Manual
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