Focusrite 4i4 for my needs?

I'm looking for an audio interface I can run the 4 outputs of my Key 61 into and get a stereo L/R output merging all 4 sources. Would the Focusrite 4i4 do that for me? I noticed it has 4 outputs, and I'm concerned it would just be pass through of the 4 outputs only. Please let me know if something else would work better. Peace.

Or I guess not the 4 TRS outputs physically on the unit, but via USB or whatever... So USB to interface with access to 4 inputs, then a single stereo L/R to my PC's sound card for processing.