But this poses the same interference potential as using the "stereo mix" input.
HOW TO USE VIRTUAL AUDIO CABLE FOR SHORTWAVE INSTALL
For years, the only virtual audio cable drivers were commercial, but there are now donationware alternatives available from The final alternative is, of course, to install a second sound card and connect a cable from its input to the output of the main sound card. This device should also show up in your Windows mixer input panel, so you can select it as a source to listen to so that you can monitor your SDR audio at all times, rather than switching inputs just to decode. The second one is to use a "virtual audio cable" driver that provides a device that you can assign as the SDR software's audio output device and another device that you can assign as the decoder's audio input device. This is the easiest method, but if you have anything else on your system making sound, it'll screw up your decodes. I think my last few systems had it enabled by default again. Most used to, then it went out of vogue for a while, although sometimes it was just hidden and needed to be enabled. A shortwave receiving antenna can be any length, but it will work better if it is cut. The first is to check if your audio mixer control program offers you a "stereo mix" selection in the input panel. (I have EasyPal installed for receiving digital, but it's hard to get a complete file received if you can't send requests for missed blocks, so I pretty much ignore digital SSTV unless I've got a huge signal coming in.) For anyone who doesn't know, there are three ways, more or less, to get a digital decoding program to work with an SDR program on Windows. The demodulated output of each channel must be guided to a different virtual audio cable VAC, e.g. There's still lots of analog SSTV on 20, but the crowd on 40 seems to prefer digital these days.