Well, it kind of worked, using the LINE IN jack on the RX Ensemble, like I should have been, going into the STEREO IN on the Sewall box, which then outputs via a USB cable to my PC . . . but it doesn't work well . . . the audio is muffled & distorted on SSB signals.
Either it's the SDR or I don't have WINDOWS 10 audio settings correct, I never tried to feed I & Q signals into my PC via the USB, let along going thru this SEWELL box to do so . . .I have other things using audio via USB and they all work OK as well as a second SDR I have that looks like it does its I & Q handling inside its box ( I think ) and it works good on my PC via the USB cable.
Al