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|1> VCFTyp:SER24
Edit Part1 FILTR
|1> VCFTyp:PAR24
Both of the filters of the POLYMORPH can be driven in parallel or series. When both filters are
connected in series they can be used as a band pass filter (low and high frequencies are damped,
middle frequencies are let through). In parallel they are notch filters (low and high frequencies are
let through, but any frequencies in-between the two cutoff points will be attenuated, creating a
notch in the spectrum). Now listen the behaviour of both filters in series and parallel operation.
FILTER COUPLE: MENU PAGE 2
It is often desirable that both cutoff frequencies of the high-pass and low-pass filters could be
shifted simultaneously. The POLYMORPH has a filter couple function. On menu page 2 of the
filter edit menus you can turn the filter couple on:
Edit Part1 Filtr
<2> VCFCoupl: ON
When the couple mode is turned on the behaviour of <LOWPASS-CUTOFF> and
<HIGHPASS-CUTOFF> changes.
With <LOWPASS-CUTOFF> you move both cutoff frequencies and with <HIGHPASS-CUTOFF>
you set the distance between the two frequencies.
In the middle position of <HIGHPASS-CUTOFF> both of the cutoff frequencies are identical.
With values below the middle position the high-pass cutoff frequency lies below the low-pass
cutoff frequency. Above the middle position the high-pass cutoff frequency lies above the low-pass
cutoff frequency. The further away from the middle position, the larger the distance between the
cutoff frequency of both filters.
FILTER DRIVE (OVERDRIVE): MENU PAGE 3
On the third menu page you can overdrive both filters of the POLYMORPH. This parameter is for
"dirty" solo sounds and roughed up effects. With the different basic waves of the oscillators you can
also produce rich over tones. Because of the distortion more disharmonic over tones waves are
added into the spectrum.
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<3> VCFDrive: 0
High filter drives do not work well with pad type sounds because the distortion usually sounds
excessive.
HIGH-PASS FILTER PARAMETERS: MENU PAGES 4 - 10
On these menu pages parameters are presented which can be also adjusted from the user surface.
This manual covers the resonance filter in the chapter, "The function of the controls and buttons"
very thoroughly. The following is the only other parameter of the high-pass filter that is not found
on the surface.
HIGH-PASS FILTER DYNAMIC: MENU PAGE 11
On menu page 11 of the filter menu you can adjust how strongly the key stroke velocity influences
the high-pass cutoff frequency.
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<11> HPF-Dyn: +0
29
The Synthesizers of the POLYMORPH
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