Inst Filter; Inst Fenv - Roland Groovebox MC-707 Reference Manual

Parameter List

INST FILTER

Parameter Value
Selects the type of filter.
OFF
LPF
BPF
HPF
PKG
Filter Type
LPF2
LPF3
Cutoff Frequency 0–1023
Cutoff Velocity Curve FIXED, 1–7
Cutoff Velocity Sens -100–+100
78
Explanation
No filter is used.
Low Pass Filter. This cuts the frequencies
in the region above the cutoff frequency
(Cutoff Frequency). Since this cuts the high-
frequency region, the sound becomes more
mellow. This is the most common filter used
in synthesizers.
Band Pass Filter. This leaves only the
frequencies in the region of the cutoff
frequency (Cutoff Frequency), and cuts
the rest. This can be useful when creating
distinctive sounds.
High Pass Filter. This cuts the frequencies in
the region below the cutoff frequency (Cutoff
Frequency). This is suitable for creating
percussive sounds emphasizing their higher
tones.
Peaking Filter. This emphasizes the
frequencies in the region of the cutoff
frequency (Cutoff Frequency). This can be
used to portray the resonance peak of a
drum.
Low Pass Filter 2. Although frequency
components above the Cutoff frequency
(Cutoff Frequency) are cut, the sensitivity of
this filter is half that of the LPF. This makes
it a comparatively warmer low pass filter.
This filter is good for use with simulated
instrument sounds such as the acoustic
piano.
* If you set "LPF2," the setting for the Resonance
parameter will be ignored (p. 78).
Low Pass Filter 3. Although frequency
components above the Cutoff frequency
(Cutoff Frequency) are cut, the sensitivity of
this filter changes according to the Cutoff
frequency. While this filter is also good for use
with simulated acoustic instrument sounds,
the nuance it exhibits differs from that of
the LPF2, even with the same TVF Envelope
settings.
* If you set "LPF3," the setting for the Resonance
parameter will be ignored (p. 78).
Selects the frequency at which the filter
begins to have an effect on the waveform's
frequency components.
With "LPF/LPF2/LPF3" selected for the Filter
Type parameter, lower cutoff frequency
settings reduce a tone's upper harmonics
for a more rounded, warmer sound. Higher
settings make it sound brighter.
If "BPF" is selected for the Filter Type, harmonic
components will change depending on the
TVF Cutoff Frequency setting. This can be
useful when creating distinctive sounds.
With "HPF" selected, higher Cutoff Frequency
settings will reduce lower harmonics to
emphasize just the brighter components of
the sound.
With "PKG" selected, the harmonics to be
emphasized will vary depending on Cutoff
Frequency setting.
Selects one of the following seven curves that
determine how keyboard playing dynamics
(velocity) influence the cutoff frequency. Set
this to "FIXED" if you don't want the Cutoff
frequency to be affected by the keyboard
velocity.
1 2 3 4 5 6
Use this parameter when changing the
cutoff frequency to be applied as a result of
changes in playing velocity. Specify a positive
"+" value if you want the cutoff frequency to
raise when you play strongly, or a negative "-"
value if you want it to lower.
Parameter Value
Resonance 0–1023
Resonance Velocity
-100–+100
Sens

INST FENV

Parameter Value
Env Depth -63–+63
Env Velocity Curve FIXED, 1–7
Env Velocity Sens -100–+100
Env Time 1 Velocity
-100–+100
Sens
Env Time 4 Velocity
-100–+100
Sens
Env Time 1–4 0–1023
Env Level 0–4 0–1023
7
Explanation
Emphasizes the portion of the sound in
the region of the cutoff frequency, adding
character to the sound. Excessively high
settings can produce oscillation, causing the
sound to distort.
LPF BPF HPF
Level
High
Frequency
Cuto Frequency
Low
Use this parameter when changing the
resonance to be applied as a result of
changes in playing velocity. Specify a positive
"+" value if you want resonance to increase
when you play strongly, or a negative "-" value
if you want it to decrease.
Explanation
Specifies the depth of the Filter envelope.
Higher settings increase the change
produced by the Filter envelope. Negative (-)
value will invert the shape of the envelope.
Selects one of the following seven types of
curve by which keyboard playing dynamics
affect the depth of the filter envelope.
If you don't want keyboard playing dynamics
to affect the filter envelope depth, specify
"FIXED. "
1 2 3 4 5 6
Specify this if you want keyboard playing
dynamics to affect the filter envelope depth.
Specify a positive "+" value if you want the
filter envelope to apply more deeply as you
play more strongly, or a negative "-" value if
you want it to apply less deeply.
Specify this if you want keyboard playing
dynamics to affect Time 1 of the filter
envelope. If you want Time 1 to be speeded
up for strongly played notes, set this
parameter to a positive "+" value. If you want
it to be slowed down, set this to a negative "-"
value.
Specify this if you want key release velocity
to affect Time 4 of the filter envelope. If you
want Time 4 to be speeded up for quickly
released notes, set this parameter to a
positive (+) value. If you want it to be slowed
down, set this to a negative (-) value.
Specify the filter envelope times (Time 1–
Time 4). Higher settings will lengthen the
time until the next cutoff frequency level is
reached. (For example, Time 2 is the time over
which Level 1 will change to Level 2.)
T1 T2 T3 T4
Cuto
Frequency
L0
L1 L2 L3 L4
Note on Note o
T: Time L: Level
Specify the filter envelope levels (Level 0–
Level 4).
Specify the amount of cutoff frequency
change at each point relative to the reference
cutoff frequency (the cutoff frequency value
specified in the Filter screen).
PKG
7
Time