Korg prologue Owner's Manual page 25

SHAPE knob
This knob will determine the final shape, complexity, or duty-cycle (Square) of the
selected waveform.
0
MODULATION
A powerful oscillator sync, cross modulation, and ring modulation
can be applied to the oscillators.
PITCH EG switch
Select the oscillator and use the EG to modulate its pitch.
VCO 2: Uses the EG to modulate the pitch of oscillator 2.
VCO 1+2: Uses the EG to modulate the pitch of operators 1 and 2.
ALL: Uses the EG to modulate the pitch of operators 1 and 2, as well as the MULTI
ENGINE.
INT knob
Sets the amount of pitch modulation (how much the pitch changes) for the PITCH EG.
Turning the knob to the right results in a greater change in pitch from the EG.
Refer to "EG" (p.34) for the EG settings.
SYNC/RING switch
The allows you to apply oscillator sync or ring modulator effects to the sound.
RING: This produces a ring modulation effect.
Oscillator 1 is used to ring-modulate Oscillator 2. By adjusting the PITCH knob of
Oscillator 2, you can create non-tonal metallic sounds.
VCO 1
VCO 2
off (center position): Turns the oscillator sync and ring modulator off.
[0...1023]
1023
[VCO 2, VCO 1+2, ALL]
[-4800...+4800]
[RING, off, SYNC]
RING MOD
25