Korg Pa4X User Manual page 525

Enabling the line audio input for MP3 recording
▪
Go to the Global > Audio & Video > Audio In
parameter is set to Line.
▪
In the same page, be sure the
This will send the line inputs to the internal MP3 recorder, and disconnects
the Mic input.
Connecting the audio inputs |511
page, and be sure the
Audio Out parameter is set to
Audio In
L + R.