Voice Meter Potato (VMP) also gets my vote. I use it for many tasks including running demodulated audio from SDRCv3 or Linrad (for EME)  to WSJT-X.  I always found Sample Rate Conversion artefacts when using VAC. It has a similar effect to poor phase noise on weak signals with up to 2dB degradation when compared to a radio (K3S or TS-890) and a soundcard. This does not happen with VMP. I don’t know this for sure, but I think if you use soundcard with a decent clock such as a UMC202HD as the master output device this becomes the reference clock. I could be wrong as this is not made clear. However, I am sure that VMP is much better than any other virtual soundcard solution that I could find 18 months ago. It also has ASIO on the virtual inputs which has much lower latency and does not get mangled by Windows.

You can monitor any signal via the main output device. Like a real mixer it as solo buttons.

Regards

Conrad PA5Y

i use potatoe from the same company ... works superb

also downloaded vac plus vac_a and vac_b and hificable

so now have 4x vac besides the 3 that potatoe brings with .. means 7 virtual cables used here together with the full blown mixer

(and additionalli installed lighthost and a few vst plugins to give my audio a better punch and sound)

so .. i can highly recommend the mixer and the virtual cables

greetz sigi dg9bfc