Filter Controls; Filter Descriptions; Filter Types - E-Mu ProteusX Operation Manual

6 - Voice Editor / Synthesizer Level
Amplifier, Filter & Auxiliary Envelopes

Filter Controls

You can choose from 53 different filter types or choose "No Filter", which bypasses the
filter section.
Most of the filters have two parameters: Frequency (or Morph) and Resonance (Q, Gain,
Body Size). These two parameters can be continuously varied during the note (choose
realtime resonance).
The frequency response curve of the filter is accurately shown in the display as you
change the initial filter settings. Frequency is shown on the horizontal axis, with
amplitude on the vertical axis.
High values of Q or resonance, amplify frequencies near the cutoff or center frequency.
In a swept EQ filter, gain controls the amount of boost or cut. In a phaser or flanger,
resonance determines the depth of the effect. In the vocal filters, body size determines
the apparent size of the mouth cavity.
You will notice an increase in voice count when the filters are bypassed as the filters steal
cycles from your computer's CPU. 12th order filters use more CPU and therefore
decrease the maximum voice count.

Filter Descriptions

Filter Name Order
2-pole Lowpass 02
4-pole Lowpass 04
6-pole Lowpass 06
2-pole Highpass 02
4-pole 04
Highpass
2-pole 02
Bandpass
4-pole 04
Bandpass
84
Type Description
LPF Typical OB type low-pass filter with a shallow
12 dB/octave slope.
LPF 4-pole low-pass filter, the standard filter on
classic analog synths. 24 dB/octave rolloff.
LPF 6-pole low-pass filter which has a steeper slope
than a 4-pole low-pass filter. 36 dB/octave
rolloff!
HPF 2-pole high-pass filter. 12 dB/octave slope.
HPF Classic 4-pole high-pass filter. Cutoff sweep
progressively cuts 4th Order High-pass.
BPF Band-pass filter with 6 dB/octave rolloff on
either side of the passband and Q control.
BPF Band-pass filter with 12 dB/octave rolloff on
either side of the passband and Q control.

Filter Types

BPF Band-pass filter
EQ+ EQ boost filter
EQ- EQ cut filter
FLG Flanger filter
HPF High-pass filter
LPF Low-pass filter
PHA Phaser filter
PROG Programmable
REZ Highly Resonant
SFX Special Effect
VOW Vowel / formant
WOW Wah-Wah pedal
Proteus X Operation Manual