EQpro-Gx Quick Doc.
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Language : English Language : French Direct-X VST Plug-in VS3 Merging Plug-in
EQpro-Gx series
Direct-X VST plug-ins

License : 2
- EQpro-G3
- EQpro-G4
Go to EQnotch-Gx informations page- EQnotch-G3
- EQnotch-G4

The very first steps

STEP -1- : Switch On a Cell.

STEP -2- : Set Gain.

STEP -3- : Adjust Frequency.

STEP -4- : Change Bandwidth.

STEP -5- : Select another Filter Type.


EQpro-G3/G4 consists in a group of 3 (or 4) similar filtering cells connected in series. It features an LCD-type screen displaying the filter's frequency response for the whole bandwith according to your settings (of course, EQpro's default frequency response is flat).

The Cell :

Each cell is activated by an ON/OFF Push Button and is set as a classical PEAK EQ by default with a gain set to 0 (classical parametric EQ).
On the right, the selector allows you to select other filter types (LPF, HPF, PEAK, BP, HI SHELVING, LO SHELVING). On the left, 3 knobs are here to set the quality, the bandwidth or the slope (depending on the filter type). The bigger knob sets the gain and the small one (top left corner) sets the frequency.

Selecting the Filter type.

Click one of the 6 push buttons to select the filter type.
Parameters can be modified according to the filter type (for example, the Peak EQ gain may be set between -36 to +36 dB, whereas the Shelving filter can only be set between -12 and +12 dB).

LCD Screen.

The LCD displays the current values of the filter parameters.


This is the classical parametric EQ type allowing you to adjust 3 values :

- The frequency.
- The gain (-36 to +36 dB)
- The Bandwidth or Quality

(The filter bandwidth is given at half gain).

Quality and Bandwidth :

To set the quality (the accuracy) of the filter, use the Q button (EE Kinda Definition). To adjust the filter's behaviour via a bandwidth setting, use the other knob, using 1/24th octave units (quarter notes). These two buttons are interdependent. The bandwidth button was designed to offer units more adapted to musicians.

Fixed Bandwidth or fixed Quality ?

The user interface gives the choice of working with a fixed bandwidth (bandwidth remains constant when changing frequency) or with a fixed Quality (Quality remains constant when changing frequency).

SHELVING Filter type.

The graph displays a High Shelving curve with a slope of 1.000.

The Slope button gets active when selecting a SHELVING filter type.


The Low Pass Filter is a 12db/oct Filter and is able to start resonating if Q parameter is increased.

Resonant LPF/HPF.

Resonance level is indirectly given by the Q or Bandwidth knob.

(Curve example when Q=15)

Band Pass Filter

The gain knob is disabled for this filter, but the accuracy of the filter can be set by the Q or the Bandwidth knob.
(The graph below displays the filter's bell-shape characteristics).

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