KORG PA4X 76 - Manual (Page 643)

Effect parameters |639
St. Mic + PreAmp (Stereo Mic Modeling + PreAmp)
This is a stereo mic and preamp simulator (Mic Model+PreAmp
(Mic Modeling + PreAmp)). For example you might use this to simulate micing
of a stereo source such as a rotary speaker.
Tube Pre Amp Mic Simulation
Tube Pre Amp Mic Simulation
Left
Right
FX Amt
Output Level
FX Amt
Stereo In - Stereo Out