TOPIC:

Hello, I just purchased a SHD and I'm trying to set it up with Dirac Live. I've configured the SHD with my 2.1 setup and everything works fine, but when I launch Dirac it only shows the 2 speakers and not the sub. The sub is connected to output 3 and I know the sub is working because if I play music it is definitely on. I only have 1 configuration in SHD and I made sure it was the one selected when I pressed Start Dirac Live Software. I'm not sure why the SHD recognizes the sub but Dirac does not.

It's all working correctly. As far as Dirac is concerned there is no sub. 
Dirac only sees a left and a right. Since you've sent a mono down mix to the sub from both channels dirac will correct those low end frequencies while correcting the main channels. 

All you need to do first (that's before running dirac) is, in the plug-in, set correct delays for the sub and mains and choose your crossover point. 

Thanks for the help. I was using the MiniDSP Dirac Live User Manual and there was a picture of what looked like a subwoofer on one of the pages. Is that for a different kind of setup? I attached a picture of the page.

That's for a minidsp product with more than 2 dirac channels.