Thanks for answers!
xzyryabx PC out to Kemper aux in. You mean this?
And should work with this cable right?
tjontheroad Whats the advantage to do this with additional mixer if the above works too? Thanks for you time.
Edit: Ups...it seems I had another account...I´m Herkiles...Got to look for the problem.
No those are digital S/PDIF connections. They're for collecting to an interface that accepts S/PDIF.
The advantage of a mixer is to have external individual control of your levels without mucking around the Kemper screens.