Filter
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57
Chapter 2. Creating Your Own Sounds
Chapter 2
[SLOPE]
Switches the filter slope.
When the “-12” indicator is lit, a gentler slope (-12 dB/octave) is
selected. When the “-24” indicator is lit, a steeper slope (-24 dB/
octave) is selected, making it easier to distinguish harmonics with
frequencies that are passed from those that are not.
fig.02-19.e
Setting the Cutoff Frequency
(CUTOFF)
[CUTOFF]
Sets the filter’s cutoff frequency. Cutoff frequency is the parameter
that determines the frequency at which the filter no longer passes
(that is, cuts) harmonics with those frequencies. Changing the cutoff
frequency allows you to control the brightness of the sound. The
cutoff frequency rises the more the knob is turned to the right
(clockwise), creating a brighter sound.
The Relationship Between Filter Type and
Cutoff Frequency
When “LPF” is the selected filter, then fewer higher-order harmonics
are included as the cutoff frequency is lowered, which creates a
mellower sound. It simultaneously reduces the volume.
When “BPF” is the selected filter, then only frequencies in the
frequency range specified in the setting are output. At higher
settings values, the sounds from waves may cease to be output.
When “HPF” is the selected filter, then fewer lower-order harmonics
are included as the cutoff frequency is raised, which creates a
sharper sound. It simultaneously reduces the volume. At higher
settings values, the sounds from waves may cease to be output.
When “PKG” is the selected filter, the harmonic components that are
emphasized change according to the cutoff frequency value.
Using Resonance to Add Fullness to
the Sound (RESONANCE)
[RESONANCE]
Turning this knob more to the right (clockwise) emphasizes the
frequencies near the cutoff frequency, giving the sound a special
quality.
fig.Resonance.e
In response to demands by pro sound designers for tone-
changing capabilities, the SH-32 permits a wide variety of
resonance settings. Because of this, raising the resonance level
too much results in extremely high output levels in specific
frequency ranges. Be careful to keep the volume settings down
when creating sounds in order to prevent overloading audio
playback equipment.
Changing the Cutoff Over Time
(A D S R, ENV DEPTH)
[A D S R]
Sets the filter envelope attack time, decay time, sustain level, and
release time. Values increase the more the sliders are raised.
fig.02-24.e
A: Time from the moment when the key is pressed until the
brightness reaches its greatest change (attack time)
D: Time for the brightness to reach the sustain level (decay time)
S: Level at which the brightness remains at a fixed level (sustain
level)
R: Time from the moment when the key is released until the
brightness returns to the original level (release time)
Level
Frequency
–24dB/oct
–12dB/oct
LPF BPF HPF PKG
parameter value
Level
Cutoff frequency
Frequency
High
Low
Cutoff Frequency
Time
A
D
Note on
R
S
Note off