Roland Prelude - Manual (Page 64)

64
The Rotary effect simulates the sound of the rotary speakers often used
with the electric organs of the past. Since the movement of the high
range and low range rotors can be set independently, the unique type
of modulation characteristic of these speakers can be simulated quite
closely. This effect is most suitable for electric organ Patches.
fig.MFX-21
This type provides modified response for the rotary speaker, with the
low end boosted further.
This effect features the same specifications as the VK-7’s built-in rotary
speaker.
fig.MFX-22
This is a stereo chorus. A filter is provided so that you can adjust the
timbre of the chorus sound.
fig.MFX-23
21: ROTARY
Parameter Value Description
Speed SLOW, FAST
Simultaneously switch the rotational
speed of the low frequency rotor
and high frequency rotor.
SLOW: Slows down the rotation
to the Slow Rate.
FAST: Speeds up the rotation to
the Fast Rate.
Woofer Slow
Speed
0.05–10.00 Hz
Slow speed (SLOW) of the low fre-
quency rotor
Woofer Fast
Speed
0.05–10.00 Hz
Fast speed (FAST) of the low fre-
quency rotor
Woofer
Acceleration
0–15
Adjusts the time it takes the low fre-
quency rotor to reach the newly se-
lected speed when switching from
fast to slow (or slow to fast) speed.
Lower values will require longer
times.
Woofer Level 0–127 Volume of the low frequency rotor
Tweeter Slow
Speed
0.05–10.00 Hz
Settings of the high frequency rotor
The parameters are the same as
for the low frequency rotor
Tweeter Fast
Speed
0.05–10.00 Hz
Tweeter
Acceleration
0–15
Tweeter Level 0–127
Separation 0–127 Spatial dispersion of the sound
Level 0–127 Output Level
22: VK ROTARY
Parameter Value Description
Speed SLOW, FAST
Rotational speed of the rotating
speaker
Brake OFF, ON
Switches the rotation of the rota-
ry speaker.
When this is turned on, the ro-
tation will gradually stop.
When it is turned off, the rota-
tion will gradually resume.
Woofer Slow
Speed
0.05–10.00 Hz
Low-speed rotation speed of the
woofer
Woofer Fast
Speed
0.05–10.00 Hz
High-speed rotation speed of the
woofer
Rotary
L out
R out
L in
R in
L out
R out
L in
R in
Rotary
2-Band EQ
2-Band EQ
Woofer Trans Up 0–127
Adjusts the rate at which the
woofer rotation speeds up when
the rotation is switched from
Slow to Fast.
Woofer Trans
Down
0–127
Adjusts the rate at which the
woofer rotation speeds up when
the rotation is switched from Fast
to Slow.
Woofer Level 0–127 Volume of the woofer
Tweeter Slow
Speed
0.05–10.00 Hz
Settings of the tweeter
The parameters are the same
as for the woofer.
Tweeter Fast
Speed
0.05–10.00 Hz
Tweeter Trans Up 0–127
Tweeter Trans
Down
0–127
Tweeter Level 0–127
Spread 0–10
Sets the rotary speaker stereo im-
age. The higher the value set, the
wider the sound is spread out.
Low Gain -15– +15 dB Gain of the low range
High Gain -15– +15 dB Gain of the high range
Level 0–127 Output Level
23: CHORUS
Parameter Value Description
Filter Type OFF, LPF, HPF
Type of filter
OFF: no filter is used
LPF: cuts the frequency range
above the Cutoff Freq
HPF: cuts the frequency range
below the Cutoff Freq
Cutoff Freq 200–8000 Hz Basic frequency of the filter
Pre Delay 0.0–100.0 ms
Adjusts the delay time from the di-
rect sound until the chorus sound
is heard.
Rate 0.05–10.00 Hz, note Frequency of modulation
Depth 0–127 Depth of modulation
Phase 0–180 deg Spatial spread of the sound
Low Gain -15– +15 dB Gain of the low range
High Gain -15– +15 dB Gain of the high range
Balance D100:0W–D0:100W
Volume balance between the direct
sound (D) and the chorus sound (W)
Level 0–127 Output Level
Parameter Value Description
L in
R in
Chorus
Chorus
L out
R out
2-Band
EQ
2-Band
EQ
Balance W
Balance W
Balance D
Balance D
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