Filter
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Owner’s Manual
Tone generator block Tone generator parameters that produce the Voice sound
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Basic Structure
Filter
This unit modifies the tone of the sound output from Pitch by
cutting (or filtering) the output of a specific frequency portion of the
sound.
Cutoff Frequency and Resonance
In the example below (a low pass filter), a portion of the signal lower
than a given frequency is allowed to pass, and signals above that
frequency are cut. This frequency is referred to as the cutoff frequency.
You can produce a relatively bright or darker sound by setting the
cutoff appropriately. Resonance is a parameter that boosts the level of
the signal in the area of the cutoff frequency. By emphasizing the
overtones in this area, this can produce a distinctive “peaky” tone,
making the sound brighter and harder.
About the main Filter types
The Low Pass Filter is shown in the illustration above – however, this
synthesizer features other Filter types (four total) as shown below.
• Low Pass Filter (above)
This passes only those signals below the Cutoff frequency. You can
then use the Reso (Resonance) parameter to add further character to
the sound.
• High Pass Filter
This passes only those signals above the Cutoff frequency. You can
then use the Reso (Resonance) parameter to add further character to
the sound.
• Band Pass Filter
This passes only those a band of signals around the Cutoff frequency.
The width of this band can be varied.
• Band Elimination Filter
This attenuates a band of signals around the Cutoff frequency, but
passes everything else.
FEG (Filter Envelope Generator)
Using the FEG, you can control the transition in tone from the moment
the sound starts to the moment it stops. You can create the FEG by
setting parameters as illustrated below. When the instrument receives
a Note On message, the cutoff frequency of the Voice will change
according to these envelope settings. This is useful for creating
automatic wah or filter sweep effects, for example. Furthermore,
different FEG parameters can be set for each Element or Key.
[VOICE] → select Voice → [EDIT] → [MUTE/SEL/ENTER] (LED turns off) →
select Element/Key → Filter display, FEG display
0
Pitch
Hold
Level
Attack
Level
Decay 1
Level
Sustain Level
(Decay 2 Level)
Release
Level
Hold
Time
Attack
Time
Decay 1
Time
Decay 2
Time
Release
Time
Time
Pressing the key (Note on) Releasing the key (Note off)
These frequencies are
“passed” by the filter.
Cutoff frequency
Resonance
Frequency
(pitch)
Level
Frequency
(pitch)
Cutoff frequency
Level
Level
Center frequency
Resonance
These frequencies are
“passed” by the filter.
Frequency
Range passed
Cutoff range
Level
Center frequency
Level
Center frequency
Range passed
Frequency
Cutoff range
0
Hold
Level
Attack
Level
Decay 1
Level
Sustain Level
(Decay 2 Level)
Release
Level
Hold
Time
Attack
Time
Decay 1
Time
Decay 2
Time
Release
Time
Time
Pressing the key (Note on)
Releasing the key (Note off)
Cutoff
Frequency