Roland MC-909 - Manual (Page 73)

73
Rhythm Edit
Patch/Sample Mode
Filter
These parameters are settings for the TVF (Time Variant Filter). They modify the timbral character of the tone by adjusting the brightness and
fatness of the sound.
Parameter Value Description
Filter Type OFF, LPF,
BPF, HPF,
PKG, LPF2,
LPF3 Type of filter
A filter cuts a specific frequency region of the sound to modify the brightness or thickness of the
sound.
OFF: A filter will not be used.
LPF: Low Pass Filter. Cuts the region that lies above the cutoff frequency. The sound will become
more mellow as the high frequency region is cut. This is the most commonly used type of filter.
BPF: Band Pass Filter. Leaves only the region in the vicinity of the cutoff frequency, and cuts the rest.
Suitable for creating sounds with a distinctive character.
HPF: High Pass Filter. Cuts the region that lies below the cutoff frequency. Suitable for creating per-
cussion instrument sounds that have a distinctive high range.
PKG: Peaking filter. Emphasizes the region in the vicinity of the cutoff frequency. You can create a
wah effect by using an LFO to cyclically modulate the cutoff frequency.
LPF2: Low Pass Filter 2. Cuts the region that lies above the cutoff frequency. This lets you leave the
cutoff frequency fixed, and use the TVF envelope settings to vary the depth of the cutoff. Since this
does not impair the feeling of energy of the sound, it is effective for acoustic-type sounds.
* The resonance setting is ignored.
LPF3: Low Pass Filter 3. Cuts the region that lies above the cutoff frequency. This filter cuts the high
frequency region more gently than LPF2. Since this does not impair the feeling of energy of the sound,
it is effective for acoustic-type sounds.
* The resonance setting is ignored.
Cutoff Frequency 0–127 Frequency (cutoff frequency) at which the filter will begin affecting the frequency content of the wave-
form
If the Filter Type is LPF/LPF2/LPF3 , reducing the cutoff frequency will diminish the higher over-
tones, producing a more mellow sound. Raising the cutoff frequency will brighten the sound.
If the Filter Type is BPF , the cutoff frequency value will change the harmonic content that will be
sounded. This is suitable for creating sounds with a distinctive character.
If the Filter Type is HPF , raising the cutoff frequency will diminish the lower overtones, emphasiz-
ing only the bright portion of the sound.
If the Filter Type is PKG , the cutoff frequency value will change the harmonic content that will be
boosted.
Cutoff Velo Curve
(Cutoff Frequency
Velocity Curve) FIX, 1–7 Curve by which pad playing dynamics will affect the cutoff frequency
If you select “FIX,” the cutoff frequency will remain fixed regardless of your playing dynamics.
Cutoff Velo Sens
(Cutoff Frequency
Velocity Sensitivity) -63– +63 Amount by which your pad playing dynamics will affect the cutoff frequency
Increasing this value will cause a correspondingly greater difference between softly played and
strongly played notes. Negative (-) values will invert the change.
Resonance 0–127 Amount by which the sound in the region of the cutoff frequency will be emphasized
Increasing this value will produce a more strongly distinctive character. Raising this excessively will
cause oscillation and distortion.
Reso Velo Sens
(Resonance Velocity
Sensitivity) -63– +63 Amount by which your pad playing dynamics will affect the resonance
Increasing this value will cause a correspondingly greater difference between softly played and
strongly played notes. Negative (-) values will invert the change.
1 2 3 4 5 6 7
LPF BPF HPF PKG
parameter value
Level
Cutoff frequency
Frequency
High
Low
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