Filter
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Parameter Guide
39
■ FILTER
Here are the filter-related parameters.
A: Type ❮ FILTER TYPE ❯ ........................ [24LPF...12HPF]
Select the filter type.
12LPF (–12dB/oct), 24LPF (–24dB/oct)
LPF (Low Pass Filter) is the most commonly used type of
file, which allows the frequencies lower than the cutoff fre-
quency to pass and cuts the higher frequencies.
Raising the cutoff frequency (“Cutoff” value) will produce
a brighter sound.
12BPF (–12dB/oct)
BPF (Band Pass Filter) allows a frequency band in the
region of the cutoff frequency to pass, and cuts the remain-
ing frequencies. It is used when you wish to emphasize
only a specific portion of the frequency range.
12HPF (–12dB/oct)
HPF (High Pass Filter) allows frequencies above the cutoff
frequency to pass, and cuts the lower frequencies. Use this
when you wish to make the sound thinner. However if the
cutoff frequency is raised excessively, the volume will
decrease significantly.
B: Cutoff ❮ CUTOFF ❯...................................[000...127]
Set the cutoff frequency.
Increasing this value will raise the cutoff frequency.
“Cutoff” can be varied by time-variant change produced
by EG1, by keyboard playing dynamics (velocity), and
by note location (keyboard tracking). The depth of each
of these effects is set by Page 08D: FILTER “EG 1 Int,”
Page 08E: FILTER “Vel Sense,” and Page 08F: FILTER
“KBD Track” respectively.
If the “Cutoff” value is lowered, the volume may be
extremely low, or you may hear no sound at all.
C: Resonance ❮ RESONANCE ❯....................[000...127]
Set the resonance of the filter.
This will emphasize the overtones near the cutoff frequency
specified by “Cutoff,” adding a distinctive character to the
sound. Increasing this value will increase the effect.
D: EG 1 Int ❮ EG 1 INT ❯.............................. [–63...+63]
This sets the depth at which EG1 will modulate the cutoff
frequency to produce time-varying changes in cutoff fre-
quency.
Positive (+) values will produce a correspondingly greater
change.
Negative (–) values will produce a correspondingly greater
change in the opposite direction.
E: Vel Sense................................................ [–63...+63]
This specifies how velocity (keyboard playing dynamics)
will affect the cutoff frequency.
With positive (+) settings, the cutoff frequency will rise as
you play more strongly.
With negative (–) settings, the cutoff frequency will fall as
you play more strongly.
F: KBD Track ❮ KBD TRACK ❯....................... [–63...+63]
This specifies how keyboard tracking (the keyboard location
that you play) will affect the cutoff frequency.
With positive (+) settings, the cutoff frequency will rise as
you play upward from the C4 note, and fall as you play
downward. With a setting of +48, the change in cutoff fre-
quency will be proportionate to the change in pitch.
With negative (–) settings, the cutoff frequency will fall as
you play upward from the C4 note, and rise as you play
downward.
With a setting of 0, keyboard tracking will not affect the cut-
off frequency.
Keyboard Track operates according to the pitch that is
controlled by pitch bend, transpose, and Mod Sequence.
It is not affected by pitch changes produced by vibrato
or Virtual Patch.
Page08: FILTER
Frequency
LPF (Low Pass Filter)
–12dB/oct
–24dB/oct
Cutoff
Frequency
BPF (Band Pass Filter)
Cutoff
Frequency
HPF (High Pass Filter)
Cutoff
The effect of resonance
LPF
HPF
BPF
Low resonance value
High resonance value
Note on
Note off
Note on
Note off
Cutoff
Int=+32
Int=0
Int=+63
Time
Cutoff frequency
specified by
“Cutoff”
Cutoff frequency
specified by
“Cutoff”
Note on
Note off
Note on
Note off
Cutoff
Int=–32
Int=0
Int=–63
Time
Program parameters