KORG R3 - Manual (Page 30)

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2. UNISON
Here you can make settings for the Unison function which “stacks” voices at the same pitch to create a richer sound.
Knob [1]
Sw (Unison Switch)
[Off, 2 Voice, 3 Voice, 4 Voice]
When the Unison Switch is turned on, you
can specify the number of voices that will
be stacked.
Off: Unison is off.
2 Voice: Unison is on; two voices are
stacked.
3 Voice: Unison is on; three voices are
stacked.
4 Voice: Unison is on; four voices are
stacked.
Depending on other voice-related set-
tings, the number of voices you specify
here may not actually be sounded.
Turning on the Unison function will
limit the available polyphony.
Knob [2]
Detune (Unison Detune) [0...99]
This parameter is available when Unison
is on (i.e., if “Sw” is 2–4 Voice). It specifies
(in units of cents) the amount of detuning
that will occur between the stacked voices.
Regardless of how many voices are
stacked, this parameter will always specify
the total range of detuning.
4 voice
Unison
Detune
0
99
2 voice
Unison
Detune
0
99
Knob [3]
Spread (Unison Spread) [000…127]
This parameter is available when Unison
is on (i.e., if “Sw” is 2–4 Voice). It controls
the width of stereo spread (panning) of the
stacked voices. The number of voices speci-
fied by “Sw” will be panned apart at equal
spacing according to this setting.