Roland Prelude User Manual download pdf (Page 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

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

L out

R out

2-Band

Balance W

Balance D

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