KORG PA4X 76 - Manual (Page 317)

Customizing the Songs |313
Soloing a MIDI Song Sound
You can solo a MIDI Song Sound exactly as you would do with a Keyboard
Sound.
▪ While the Volume pane is shown, or while in any page where the digital mixer
appears, keep the SHIFT button pressed, and touch the mixer channel that
you want to listen in solo.
▪ As an alternative, while in any page where the name of the Sound or the
mixer channel appears, select it and choose the Solo Track command from
the page menu .