GEM PK5 Owner's Manual page 63

Chorus
The CHORUS processor is activated by the corresponding button.
Pressing the CHORUS button turns the corresponding display indicator on or off, activating/deactivating the
relative processor.
By holding the button pressed for about 2 seconds, the display shows the currently selected Chorus type in
large letters, which you can change with the Page buttons.
Each effect selected also displays its associated general volume level.
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Note: The CHORUS proc-
essor contains modulations
and various delay/echo ef-
fects. Also present is the
ROTARY effect which can
be changed from SLOW to
FAST and vice versa, using
the ENTER and ESCAPE
buttons (only in the principal
play modes such as Sound,
Perf, Style, Song, etc.).
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The Styles 57