Roland VK-8 Benutzeranleitung

 

Tone Wheel and Leakage Noise are important elements in creating tone wheel organ 

sounds.

 

Tone wheels are the ninety-one metal disks that produce the sound on tone wheel 
organs. Teeth are cut into the edge of each disk, and sound is generated by rotating 
the disks past an electrical coil at a fixed speed. The VK-8 digitally simulates the tone 
wheel mechanism of a tone wheel organ, and thus provides the rapid response and 
full polyphony that characterize these instruments.
The sounds that are produced by the tone wheels of a tone wheel organ are not 
precisely pure sine waves, since they are affected by the manufacturing precision of 
the wheel and by the characteristics of the analog circuitry. However, it is these 
imperfections in the waveform that give a tone wheel organ its unique character.

 

On tone wheel organs, the sound of the note that was pressed was slightly 
“contaminated” by audio signals from tone wheels not related to that note. 
Formerly, this was seen as a problem, but today this idiosyncrasy is considered an 
important element of the distinctive sound of a vintage organ.

 

Selects the type of tone wheel.

 

fig.01-17

 

Each time you press the [TONE WHEEL] button, the tone wheel will switch between 

the following settings.

 

Separately from the leakage noise selected by the Tone Wheel Type, you can add 

leakage noise independently.

 

Turning the knob toward the left will decrease the volume of the leakage noise, and 

turning it toward the right will increase the volume of the leakage noise.

 

A tone wheel that simulates the tone wheel organs of the 
70’s.

 

A tone wheel that simulates the tone wheel organs of the 
60’s.

 

A tone wheel with no leakage noise.

If the “VINTAGE1” or 

“VINTAGE2” wheel type is 

selected, there will still be 

some leakage noise even if the 

[LEAKAGE] knob is turned all 

the way to the left.

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