Roland GAIA Synthesizer SH-01 Owner's Manual page 33

HPF (High-Pass Filter)
This type of filter cuts the frequency range that is below
the cutoff frequency, emphasizing the high-frequency
range.
This can be used to create percussion instrument sounds
with a distinctive high-frequency range.
Volume
Cut
region
BPF (Band Pass Filter)
This type of filter passes only the range of frequencies
in the region of the cutoff frequency, cutting the other
frequencies.
This is suitable for creating distinctive sounds.
If you've selected "NOISE" as the oscillator waveform,
selecting this filter type will allow only a specific frequency
region of the noise to be heard, allowing you to play
"pitched noise. "
Volume
Cut
region
PKG (Peaking Filter)
This type of filter boosts the range of frequencies in the
region of the cutoff frequency.
By using the LFO to cyclically modulate the cutoff
frequency, you can use this to produce a wah effect.
Volume
BYPASS
The sound will not be sent through the filter. The oscilla-
tor's sound will be output without change.
Frequency
Cut
region
Frequency
Boosted region
Frequency
[MODE] button
This button selects the type of filter that will be applied to
the waveform.
Press the button to make the indicator light for the desired
type of filter.
Pressing the button cycles you through the available
choices, as follows: LPF
LPF ...
[SLOPE] button
This button selects the slope (steepness) of the filter.
Press the button to toggle the indicator between unlit and
lit. This allows you to switch between slopes of -12 dB and
-24 dB per octave.
Example: LPF (Low-Pass Filter) slope
Volume
-24 dB
Cutoff
frequency
Unlit (-12 dB)
The filter slope will be gentle; some sound near the cutoff
frequency will remain.
Lit (-24 dB)
The filter slope will be steep; the sound immediately above
(or below) the cutoff frequency will be cut.
[CUTOFF] knob
This knob specifies the filter cutoff frequency.
LPF
Turning the knob toward the right will brighten the sound;
turning it toward the left will make the sound darker (more
mellow).
HPF
Turning the knob toward the right will make the sound
lighter (thinner); turning it toward the left will make the
sound heavier (thicker).
BPF
Turning the knob toward the right allows the high-
frequency range to be heard; turning it toward the left
allows the low-frequency range to be heard.
PKG
Turning the knob toward the right will move the boosted
region toward the high-frequency range; turning it
toward the left will move the boosted region toward the
low-frequency range.
* If "BYPASS" is selected as the filter mode, turning the
[CUTOFF] knob will not affect the sound.
HPF BPF PKG BYPASS
-12 dB
Frequency
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