Roland VK-8 Benutzerhandbuch

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

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.

This button temporarily halts the rotation of the rotary sound.

The rotary speaker effect can be switched off.

The speed of rotation will gradually slow down and then 
stop.

From a stopped condition, the rotation will gradually be-
come faster.

The rotary speaker will be applied.

The rotary speaker effect will not be applied.

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.

Disabled when a rotary 

speaker is connected.

Changes the speed of the 

connected rotary speaker.

Temporarily stops the rotation 

of the connected rotary 

speaker.

You can use a foot switch or D 

Beam controller to switch the 

rotary speaker between fast 

and slow. For details, refer to 

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 

resonance of the speaker 

cabinet, and the distance of the 

microphone which picks up 

the sound of the rotary speaker