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Filter
MS-20 LPF and HPF: These 12dB/octave, self-resonating filters lovingly recreate the distinctive timbral signature of the
classic Korg MS-20. If the input level is high, raising Resonance will cause increasing amounts of saturation and
overdrive, creating a more aggressive tone. To control this, use Trim (see "Trim" on page 38).
Polysix: This 24dB/octave, self-resonating low-pass filter provides the strong, sweet sound of the classic Korg Polysix.
Cutoff
(CUTOFF)
[-4.00 or +8.00...+136.00 or +138.00 semitones]
This controls the cutoff frequency of the filter, in semitones mapped to MIDI note numbers (60.00 = middle C). The
frequency in Hz is also shown. The specific effect of the cutoff frequency will change depending on the selected Type,
as described above. Most filter types have a range of -4.00 to +138.00, but the MS-20 LPF/HPF and Polysix range from
+8.00 to +136.00.
Res
(RESONANCE)
[0.00...100.00%]
Resonance emphasizes the frequencies around the cutoff frequency, as shown in the diagram below.
When this is set to 0, there is no emphasis, and frequencies beyond the cutoff will simply diminish smoothly.
At medium settings, the resonance will alter the timbre of the filter, making it sound more nasal, or more extreme.
At very high settings, the resonance can be heard as a separate, whistling pitch.
Low Resonance
High Resonance
(Resonance) Bass
[Full, Tight]
This is available only when Type is one of the 2-pole Resonant or 4-pole Resonant settings, or Multi Filter. Resonance
Bass controls the character of the filter resonance at low cutoff frequencies. Its effect is most noticeable with high
Resonance settings.
Tight produces a more restrained resonance, similar to a classic, American, wood-paneled monophonic synthesizer.
Full produces a wide, boomy resonance, reminiscent of a famous five-voice American synthesizer.
Resonance Type
[Standard, High]
This is available only when the Type is set to one of the 4-pole settings.
Standard provides the resonance character of a typical analog 4-pole filter.
High creates a more pronounced resonance.
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