Playing the Organ

[SLOW] (Slow Percussion) button

Switches the speed at which the percussion sound will decay.

Button

Explanation

The percussion sound will disappear slowly. The percus- sion will have a more gentle attack.

Lit (ON)

The percussion sound will disappear quickly. The percus- sion will have a sharper attack.

Dark (OFF)

Fast Percussion

Slow Percussion

You can specify the speed at

which the percussion sound

decays (p. 51).

Volume Short decay time

Percussion

Time

Volume

Long decay time

Percussion

Volume of the

harmonic bars

Time

Percussion on a tone wheel organ (Single Trigger Algorithm)

The percussion on tone wheel organs did not apply to all notes that were played. It was applied only to notes which were played simultaneously from a condition where no notes were being played. When notes were played legato (smoothly and connectedly), percussion was applied only to the first-played note. When notes were played staccato (articulating each note separately), percussion was applied to all notes. This method is referred to as single trigger algorithm, and is a very important element in organ performance. On tone wheel organs, percussion was produced by an analog circuit. For this reason, when there was only a very short time interval from when one key was released until the next key was pressed, the percussion circuit was unable to recharge fully, causing the percussion to sound at a lower volume. The VK-8 simulates this behavior, and also allows you to modify the organ voice settings to adjust the recharge time characteristics of the circuit (p. 51).

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Roland VK-8 owner manual Slow Slow Percussion button, Fast Percussion