Keith,
Thank you for shielding my initial request of trying to avoid mixer smile

Eddie, I spent over an hour trying to search for just a splitter that would have some sort of resistor (?) that would prevent signal leak into output of interface. But could not find anything remotely close to what I was looking for..as I was not sure WHAT I am looking for...
So if even Jim, Billy and Charlie could not suggest something readily made and simple to the bone, I bought what I bought. Who knows, maybe because it is unpowered I will run into same issue of signal leaking. Will post back when I get it.

Billy Lol, but actually you gave me an idea. I will go with A/B switcher if signal will leak with unpowered mixer I bought. Something like this:
https://www.amazon.com/4minds-Splitter-selector-Computer-Headphones/dp/B0776JX4JQ