Comb Filter - Korg EXB-MOSS Manual

Comb Filter

In this oscillator, the signal from the other oscillator
waveform or the noise generator is sent through a
comb filter, and the feedback level of the comb filter
is varied in order to produce tonal change.
When noise is input, raising the feedback of the comb
filter will gradually change the sound into a pitched
tone.
Comb Oscillator
Noise Level
Input Level Mod.Source/Intensity
Noise
OSC1/2 or
Sub OSC
Filter1 out
Input Wave
Filter2 out
Level
Pulse Noise
or Impulse
Example of when noise is input
Feedback>0
Level
Comb Filter
Frequency
Feedback=0
1–3a
1–3b
1–3c
1–3a: Input
Input
[OSC2(1)+Noise, SubOSC+Noise, Filter1+Noise,
Filter2+Noise, Pulse Noise, Impulse]
Selects the signal that will be input to the comb filter.
Example of when an Impulse is input
Comb Filter
Time
Time
Pluse Pluse
Width=0 Width=99
Level (Input Wave Level)
Specifies the volume level of the signal that will be
input to the comb filter.
Comb Filter
Delay
High Damp
Comb Filter Feedback
Level
Frequency
Level
As the Feedback value increases,
the sound will become more pitched.
Frequency
Feedback>0
Time
As the Feedback is
increased, the decay
time will become longer.
Time
Feedback=0
[0...99]
Noise Level
This parameter will be available only if "Input" has
been set to OSC2(1)+Noise, SubOSC+Noise,
Filter1+Noise or Filter2+Noise. It specifies the
volume level of the noise generator output which will
be input to the comb filter.
Pulse Width
This parameter will be available only if "Input" has
been set to Pulse Noise or Impluse.
It specifies the length of time that the Pulse Noise or
Impluse will last after being triggered.
AMS (Alternate Modulation Source)
Selects a modulation source ( p.48 of this manual)
that will control the volume level of the signal being
input to the comb filter.
The volume level is set by the "Level" or the "Noise
Level."
Intensity (Input Wave Level AMS Intensity)
Specifies the depth and direction of the effect of
"AMS."
1–3b: Feedback
Fbk (Feedback)
Specifies the amount of feedback for the comb filter.
If this value is high , the resonance of the comb filter
will be high, and the tone will have a clear sense of
pitch. Conversely, if this value is low , the input signal
will be output without change, and if the input signal
is only noise, the output signal will have no sense of
pitch.
AMS1 (Alternate Modulation Source 1)
Selects a modulation source 1 ( p.48 of this manual)
that will control "Fbk."
Intensity (Feedback AMS1 Intensity)
Specifies the depth and direction of the effect of "AMS1 ."
AMS2 (Alternate Modulation Source 2)
Selects a modulation source 2 ( p.48 of this manual)
that will control "Fbk."
Intensity (Feedback AMS2 Intensity)
Specifies the depth and direction of the effect of "AMS2 ."
[0...99]
[0...99]
[Off...MIDI:CC#83]
[–99...+99]
[0...99]
[Off...MIDI:CC#83]
[–99...+99]
[Off...MIDI:CC#83]
[–99...+99]
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