Hi K4,
I'm still pretty green myself on all this but I'm a little bit ahead and will help if I can. There's a few ways to get to the final step of having a voice stream to use DSD+ on, but it isn't clear which way you are coming from.
Working backwards from that, can infer you want to decode voice traffic with DSD+, requires that you pipe a signal over to DSD. In practice afaik this is done exclusively via two methods in Windows. Virtual Audio Cable which is free to make 1 virtual cable, and VB Cable which is also free, and cheaper maybe? to add additional cables (up to 3 max. VAC can make many more than that but costs more).
But once you settle on one of those two, you'll need something to send that signal over to it. There's a few ways here. I went with Unitrunker very similar to this guide:
https://www.rtl-sdr.com/rtl-sdr-tutorial-following-trunked-radio-unitrunker/ There is also another option to pipe the voice signal over via SDR# instead which isn't tooo painful, but itsn't very tenable with a trunking system, if that is your target. Also some other options, I've head of SDRTrunk or something like that which is used. So that is kind of the backward path, and what can give you a DSD+ signal to work with from my very novice understanding.
If you give a little more information on what type of system you want to rx can help you further, but there are other good tutorials on that rtl-sdr site and also an e-book all the way on right at the top navi bar on their site. Things are still being developed, its a very much active community, and you'll find the latest news (and friendly people) on these forums best I can tell.
Good luck.
-Dan
P.S. I found the forums dedicated to your specific state (if in the US) very helpful to read back on perhaps others that have walked the path you are trying to follow.
