Reference • Effects
188
34: Rotary Speaker
This effect simulates the sound of the rotary speakers
that are popularly used with electric organs. Rotary
speakers contain a motor which rotates the high fre-
quency speaker horn at either a high or a low speed.
The rotary speaker effect can be used in a variety of
ways, but is generally used by changing the rotary
speaker’s rotational speed from slow to fast at points
in the music where the musician wishes to build up or
add excitement. This creates an effect of movement as
if the sound were being shaken.
34: Rotary Speaker mixes the input signals from the
left and right channels, and then creates the rotary
effect using a completely independent LFO (low fre-
quency oscillator). The signal of neither channel will
be equalized.
You can use dynamic modulation to switch between
slow and fast while you play. Use a switch-type con-
troller for this purpose. I.e., even if a continuous con-
troller is moved rapidly, this will not cause the
rotational speed to follow the motion, and will not
affect the way in which the low and high speeds
switch. The rotational speed is not affected by the
speed at which the controller is moved, but will
change to the new speed at the rate specified by the
AC (acceleration) parameter. ☞P. 178.
35, 36: Tremolo
Tremolo is an effect that uses an LFO (low frequency
oscillator) to modulate the output volume. It is partic-
ularly effective on slow melody lines or when playing
spacious chords, but is not very suitable when playing
rapid phrases.
35: Auto Pan applies opposite-phase modulation to
the volume of the left and right channels, causing an
effect as though the sound were being panned
between left and right.
36: Tremolo applies same-phase modulation, produc-
ing a standard tremolo effect.
For both effects, the sound passes through a two-band
shelving equalizer before the tremolo effect is applied.
Dry:Effect balance DRY,
99:1…1:99,
FX
Set the balance between the
direct sound (DRY) and the
sound processed by the effect
(FX). With a setting of DRY, the
effect will be turned off. With a
setting of FX, only the phaser
effect sound will be heard. Other
settings set the proportion of the
direct sound and effect sound.
V
I
B
Vibrato depth 0…15 Set the depth of the vibrato
effect. (This corresponds to the
diameter of the rotating speaker
horn.) Higher values will produce
a more definite vibrato effect.
A
C
Acceleration 1…15 When dynamic modulation is
used to switch the rotational
speed, this parameter sets the
time required to accelerate from
low speed to high speed (or to
decelerate from high to low
speed). Higher settings will
result in faster acceleration or
deceleration.
S Slow speed 1…99 Set the rotational speed for
when the LFO is switched to the
slow speed. Higher settings will
produce faster rotation.
F Fast speed 1…99 Set the rotational speed for
when the LFO is switched to the
fast speed. Higher settings will
produce faster rotation.
Left
Rotary Speaker
Right
Mix
Mix
Dry:Effect balance DRY,
99:1…1:99,
FX
Set the balance between the
direct sound (DRY) and the
sound processed by the effect
(FX). With a setting of DRY, the
effect will be turned off. With a
setting of FX, only the rotary
speaker effect sound will be
heard. Other settings set the
proportion of the direct sound
and effect sound.
LFO waveform SIN, TRI Select the waveform that the
LFO will use to modulate the
input level of the signal. You can
select either sine wave (SIN) or
triangle wave (TRI).
W LFO width –99…+99 Adjust the LFO waveform. Incre-
asingly positive settings will
cause the peak of the waveform
to become broader, and nega-
tive settings will cause the peak
of the waveform to become nar-
rower and sharper.
Left
EQ
Auto Pan
Right
Mix
Mix
Auto Pan
EQ
Mod
Left
EQ
Tremolo
Right
Mix
Mix
Tremolo
EQ
Mod
Auto Pan Tremolo
level Modulation waveform
LFO width =–99
LFO width =0
LFO width =+99
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