Korg Pa4X User Manual page 758

744| Effects for the Sounds
a: Mode
This parameter switches the pitch shifter operating mode. With Slow, tonal
quality will not be changed too much. With Fast, the effect becomes a Pitch
Shifter that has a quick response, but may change the tone. Medium is in-
between these two. If you do not need to set too much pitch shift amount, set
this parameter to Slow. If you wish to change the pitch significantly, use Fast.
b: Pitch Shift [1/2tone]
b: Src
b: Amt
c: Fine [cents]
c: Amt
The amount of pitch shift will use the value of the Pitch Shift plus the Fine
value. The amount of modulation will use the b: Amt value plus the c: Amt.
The same Modulation Source is used for both Pitch Shift and Fine.
e: Feedback Position
f: Feedback
When Feedback Position is set to Pre, the pitch shifter output is again input
to the pitch shifter. Therefore, if you specify a higher value for the Feedback
parameter, the pitch will be raised (or lowered) more and more each time
feedback is repeated.
If Feedback Position is set to Post, the feedback signal will not pass through
the pitch shifter again. Even if you specify a higher value for the Feedback
parameter, the pitch-shifted sound will be repeated at the same pitch.