Well....

I found this to get you started.....just the patch names in case you have to create your own .ins to interface with your DAW software.
(Are you using DAW software as your Korg midi interface?)

http://www.korgpa.sk/ins/korg_pa4x_all_basic_2015v2.ins

Also found this site but it appears you to have to register....judgement call for you....but, check the link at bottom of the second post if you decide to register.
https://www.notation.com/vb-forum/showthread.php?p=68534

EDIT: this site may help....scroll to bottom page for specs/support software/owners manual.
https://www.korg.com/us/products/synthesizers/pa4x/page_2.php

I fired up my DAW with Sonar X3 to search for you but there is no .ins file provided for the KORG PA4X.

Also, the Cakewalk site states that you may need to contact Korg if you're not willing to create your own .ins file....here's how:
https://www.cakewalk.com/Support/Knowledge-Base/2007013272/Instrument-Definitions#Locate

Hope that helps a bit....

Last edited by chulaivet1966; 08/18/18 09:16 AM.