8.0

Included VST Instruments
Prologue
235
Filter type
Sets the filter type to low-pass, high-pass, band-pass, or notch.
Cutoff
Controls the filter frequency or cutoff. If a low-pass filter is used, it can control
the opening and closing of the filter, producing the classic sweeping
synthesizer sound. How this parameter operates is governed by the filter type.
Emphasis
This is the resonance control for the filter. For low-pass and high-pass filters,
raising the Emphasis value emphasizes the frequencies around the set cutoff
frequency. This produces a generally thinner sound, but with a sharper, more
pronounced cutoff sweep. The higher the filter Emphasis value, the more
resonant the sound becomes until it starts to self-oscillate, generating a
distinct pitch. For band-pass or notch filters, the Emphasis setting adjusts the
width of the band. If you raise the value, the band where frequencies are let
through (band-pass), or cut (notch) becomes narrower.
Drive
Adjusts the filter input level. Levels above 0 dB gradually introduce a soft
distortion of the input signal, and decrease the filter resonance.
Shift
Internally, each filter consists of two or more subfilters connected in series.
This parameter shifts the cutoff frequency of the subfilters. The result depends
on the filter type: For low-pass and high-pass filter types, it changes the filter
slope. For band-pass and notch filter types, it changes the bandwidth. The
Shift parameter has no effect for the filter types 12
dB LP or 12 dB HP.
Tracking
If this parameter is set to values over the 12 o’clock position, the filter cutoff
frequency increases the further up on the keyboard you play. Negative values
invert this relationship.
If the Tracking parameter is set fully clockwise, the cutoff frequency tracks the
keyboard by a semitone per key.
About the Filter Types
You select the filter type using the buttons around the filter cutoff knob. The
following filter types are available (listed clockwise starting from the 9
o’clock
position):
12 dB LP
Low-pass filters let low frequencies pass and cut out the high frequencies.
This low-pass filter has a gentler slope (12
dB/octave above the cutoff
frequency), leaving more of the harmonics in the filtered sound.