Van Der Pol Filter - ENSONIQ DP/4+ Reference Manual

Section 2 — Algorithms

VAN DER POL FILTER

VandrPol Filter adds synthetic high harmonics to the input signal, brightening the overall sound.
This 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.
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
Controls the boost or cut of the high pass filter frequency applied to the input signal.
04 — LowPass Fc
Controls the boost or cut of the low pass filter frequency applied to the input signal.
05 — Filter Gain
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
08 — Mod1 Param Range Min 12 — Mod2 Param Range Min
09 — Mod1 Param Range Max13 — Mod2 Param Range Max
See the descriptions under the Algorithm Modulators in the beginning of this section.
96
Range: 4 to 8000 Hz
Range: 100 Hz to 16 KHz
Range: -48 to +48 dB
10 — Mod2 Source
11 — Mod2 Destination
ENSONIQ DP/4+ Reference Manual