Filter Parameters - Roland Groovebox MC-307 Reference Manual

Chapter 6 Making Original Patches

FILTER parameters

FILTER: TYPE
Select the type of filter.
Range:
- OFF:
The filter will not be applied (all filter indicators are
dark).
- LPF (Low Pass Filter):
This is the most common type of filter, and allows audio
signals with frequencies below the cutoff frequency to
pass. It is used to make the sound more mellow.
- BPF (Band Pass Filter):
This filter allows frequencies in the region of the cutoff
frequency to pass, and cuts the rest.
- HPF (High Pass Filter):
This filter allows frequencies above the cutoff frequency
to pass. It is used to make the sound brighter and
sharper.
- PKG (Peaking Filter):
This filter boosts the overtones in the region of the cutoff
frequency. It will emphasize the mid-range, and is useful
for creating a distinctive sound.
FILTER: CUTOFF
Specifies the frequency at which the filter will begin to affect
the frequency components of the waveform (the Cutoff
Frequency). By changing the cutoff frequency, you can
control the brightness of the sound.
Range: 0–127
The effect will depend on the Filter Type.
- LPF (Low Pass Filter)
Higher values will cause the sound to become brighter,
approaching the original waveform. Lower values will
cut more of the high frequency overtones, making the
sound darker.
* For some waveforms, you may not be able to hear any sound if
you lower the value too far.
Level
CUTOFF=0 CUTOFF=64
- BPF (Band Pass Filter)
Higher values will raise the frequency area that is heard.
Lower values will cause only a progressively lower
108
Frequency
CUTOFF=127
frequency area to be heard.
Level
CUTOFF=0 CUTOFF=64
- HPF (High Pass Filter)
As this value is increased, the low frequency range will
be cut more greatly, making the sound sharper. As this
value is decreased, the original sound of the waveform
will be heard.
* For some waveforms, you may hear no sound if this value is
raised excessively.
Level
CUTOFF=0 CUTOFF=64
- PKG (Peaking Filter)
As this value is increased, the frequency area that is
emphasized will rise. As this value is decreased, the
frequency area that is emphasized will fall.
Level
CUTOFF=0 CUTOFF=64
In operating FILTER, be careful not to set RESONANCE
too high. Excessively high values may cause sounds to be
distorted or the volume level to become unexpectedly high.
Some settings may damage your hearing, or your speakers.
Please use caution.
Frequency
CUTOFF=127
Frequency
CUTOFF=127
Frequency
CUTOFF=127