Using The Cosm Rotary Speaker Effect (Rotary Sound) - Roland VK-8 Owner's Manual

Playing the Organ
Using the COSM Rotary Speaker Effect
(Rotary Sound)
Rotary Sound is an effect which adds the modulation that is produced when organ
voices are used with a rotary speaker. On most rotary speakers, the high-frequency
speaker and low-frequency speaker rotate at different speeds. The VK-8 can simulate
this type of complex modulation.
fig.01-27
[SLOW/FAST] button
Switches the speed of the rotary speaker. FAST and SLOW will alternate each time
you press the [SLOW/FAST] button.
FAST rotation is selected when the indicator blinks rapidly. SLOW rotation is
selected when the indicator blinks slowly. When you change between slow/fast, the
speed of rotation will change gradually.
[BRAKE] button
This button temporarily halts the rotation of the rotary sound.
Button
Lit (ON)
Dark (OFF)
ROTARY [ON] button
The rotary speaker effect can be switched off.
Button
Lit (ON)
Dark (OFF)
32
Explanation
The speed of rotation will gradually slow down and then
stop.
From a stopped condition, the rotation will gradually be-
come faster.
Explanation
The rotary speaker will be applied.
The rotary speaker effect will not be applied.
The VK-8 uses an effect
algorithm based on COSM
technology, and is able to
faithfully reproduce the
modulation of an actual rotary
speaker and the irregularities
of its rotation. You can also
make sophisticated settings,
such as the characteristics of
the amplifier (p. 33), the
resonance of the speaker
cabinet, and the distance of the
microphone which picks up
the sound of the rotary speaker
(p. 50).
You can use a foot switch or D
Beam controller to switch the
rotary speaker between fast
and slow. For details, refer to
"Using the D BEAM Controller
to Produce Common Organ
Effects" (p. 34) and "Assigning
a Function to the Control
Pedal" (p. 40).
When a rotary speaker is
connected to the ROTARY
TONE CABINET jack on the
rear panel, the rotary effect is
not applied, and the [SLOW/
FAST] button, [BRAKE]
button, and ROTARY SOUND
[ON] button function as
follows.
ROTARY SOUND [ON]
Button
Disabled when a rotary
speaker is connected.
[SLOW/FAST] Button
Changes the speed of the
connected rotary speaker.
[BRAKE] Button
Temporarily stops the rotation
of the connected rotary
speaker.