ROLAND VK-88
Manual de Usuario

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-88 can simulate this type of complex modulation.
fig.01-27

The VK-88 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. 41), the resonance of the speaker cabinet, and the distance of the microphone which picks up the sound of the rotary speaker (p. 66).

ROTARY SOUND [ON] button
The rotary speaker effect can be switched off. Button Explanation The rotary speaker will be applied. Lit (ON)
You can use a foot switch, D Beam controller, or other controllers to switch the rotary speaker between fast and slow. For details, refer to p. 42, 58, 68, 69, 70).

The rotary speaker effect will not be applied. Dark (OFF)

SPEED Indicator
The left and right indicators light up alternately, indicating the speed of the rotary speaker. When you press the [BRAKE] button to stop the rotation of the rotary sound, the indicator stops flashing, and then either or both indicators remain lit.
When a rotary speaker is connected to the ROTARY TONE CABINET jack on the rear panel, the [SLOW/FAST] button, [BRAKE] button, and ROTARY SOUND [ON] button function as follows. [SLOW/FAST] Button Changes the speed of the connected rotary speaker. The VK-88�s rotary effect is not applied. [BRAKE] Button Temporarily stops the rotation of the connected rotary speaker. ROTARY SOUND [ON] Button Disabled when a rotary speaker is connected.

[SLOW/FAST] button
Switches the speed of the rotary speaker. FAST and SLOW will alternate each time you press the [SLOW/FAST] button. When the SPEED indicator is flashing rapidly, it indicates that the rotary effect is in FAST mode; in SLOW mode, this flashes slowly. The change in rotation speed when switching between FAST and SLOW occurs gradually.

[BRAKE] button
This button temporarily halts the rotation of the rotary sound. Indicator Either the left, the right, or both SPEED indicators light up. The left and right SPEED indicators blink alternately Explanation The speed of rotation will gradually slow down and then stop. From a stopped condition, the rotation will gradually become faster.

40