FXAlg #727: PolyD EQ
Algorithm Reference-100
PAGE 4
Wet/Dry
This is a simple mix of the distorted signal relative to the dry undistorted input signal.
Out Gain
The overall gain or amplitude at the output of the effect. For distortion, it is often
necessary to turn the output gain down as the distortion drive is turned up.
Dist Drive
Applies gain to the input prior to distortion. It is the basic Òdistortion driveÓ control.
Anything over 0 dB could clip. Normally clipping would be bad, but the distortion
algorithm tends to smooth things out. Still, considering that for some settings of the
other parameters you would have to back off the gain to -48 dB in order to get a not very
distorted sound for full scale input, you should go easy on this amount.
Curve
n
The curvature of the individual distortion stages. 0% is no curvature (no distortion at
all). At 100%, the curve bends over smoothly and becomes perfectly ßat right before it
goes into clipping.
LP
n
Freq
These are the one-pole lopass controls. LP0 Freq handles the initial lopass prior to the
Þrst distortion stage. The other lopass controls follow their respective distortion stages.
With all lopasses out of the circuit (set to the highest frequency), the sound tends to be
too bright and raspy. With less distortion drive, less Þltering is needed. If you turn off a
distortion stage (set to 0%), you should turn of the lopass Þlter by setting it to the highest
frequency.
Bass Gain
The amount of boost or cut that the bass-shelving Þlter should apply to the low-
frequency signals in dB. Every increase of 6 dB approximately doubles the amplitude of
the signal. Positive values boost the bass signal below the speciÞed frequency. Negative
values cut the bass signal below the speciÞed frequency.
Bass Freq
The center frequency of the bass shelving Þlter in intervals of one semitone.
Treb Gain
The amount of boost or cut that the treble-shelving Þlter should apply to the high-
frequency signals in dB. Every increase of 6 dB approximately doubles the amplitude of
the signal. Positive values boost the treble signal above the speciÞed frequency. Negative
values cut the treble signal above the speciÞed frequency.
Treb Freq
The center frequency of the treble shelving Þlter in intervals of one semitone.
Mid Gain
The amount of boost or cut that the mid parametric Þlter should apply in dB. Every
increase of 6 dB approximately doubles the amplitude of the signal. Positive values
boost the signal at the speciÞed frequency. Negative values cut the signal at the
speciÞed frequency.
Mid Freq
The center frequency of the mid parametric Þlter in intervals of one semitone. The boost
or cut will be at a maximum at this frequency.
Mid Wid
The bandwidth of the mid parametric Þlter may be adjusted. The bandwidth is speciÞed
in octaves. Small values result in a very narrow Þlter response. Large values result in a
very broad response.
Bass Gain
-79.0 to 24.0 dB
Treb Gain
-79.0 to 24.0 dB
Bass Freq
16 to 25088 Hz
Treb Freq
16 to 25088 Hz
Mid1 Gain
-79.0 to 24.0 dB
Mid2 Gain
-79.0 to 24.0 dB
Mid1 Freq
16 to 25088 Hz
Mid2 Freq
16 to 25088 Hz
Mid1 Width
0.010 to 5.000 oct
Mid2 Width
0.010 to 5.000 oct
