Peter Hall, VK6HP
The easiest way to get the SDR going with WSJT-X without disturbing any existing program instances dedicated to other radios is to follow the instructions in the WSJT-X manual regarding multiple instances of WSJT-X. In essence, this involves choosing a name for the SDR instance, then running WSJT-X from a Windows command line prompt, with the name of the radio within the prescribed syntax. You can then make a desktop shortcut to the new instance, with the target the same as the run command you used in the command line. For example, my shortcut target reads: C:\WSJT\wsjtx\bin\wsjtx.exe --rig-name=SDRUno
As I mentioned before, I use VSPE for the CAT control. I just create a "pair" of serial devices (COM7 and COM8). Within SDRuno Rx Control settings I assign COM7 as the CAT port, with COM8 used in the WSJT-X "radio" tab. Similarly, the free version of Virtual Audio Cable creates one cable, which is assigned as the "out" path in SDRuno (set to both L and R audio channels). In WSJT-X settings the virtual audio cable is assigned as the audio path.
Here's a screenshot taken during some setup experiments involving "weak-ish" signals earlier this year. Although the various spectrum settings are less than optimum, in this case you can see the WSJT-X display is more useful than the SDRuno spectra.