I ran across DSDPlus, an application that apparently will decode various digital modes, including DMR. I don’t have a DMR radio, so I thought it would be neat to see if I could listen to it with this application. I use the IC-7100 for SSTV and FT-8, so the USB audio stuff was pretty much set up. This is what I did to listen to DMR.

1. Download DSDPlus from https://www.dsdplus.com/
2. Download the DSDPluss DLL files.
3. Extract both downloaded zip files.
4. Copy the files from the DLL folder into the DSDPlus folder.
5. Open a command prompt and go to the DSDPlus directory.
6. Run DSDPlus.exe and note the IC-7100 input audio device number. In my case, it was #4.
7. Also, note the output device where you will listen, i.e., look for the ID for your speakers. In my case it was #1.
8. Press the Escape key to quit.
9. Run DSDPlus.exe with the following parameters for input and output devices:
   -iN -oN where N is the number of your input and output numbers. In my case, I ran DSDPlus.exe -i4 -o1.
10. Tuned the radio to a local DMR repeater and set it to FM-Data mode.

At this point DSDPlus ran, and the radio was hearing traffic, but nothing decoded. I had to make a change under the IC-7100 connectors.

1. Press the Set button.
2. Go to page 3/4.
3. Press the Connectors menu item.
4. Go to page 4/4.
5. Set 9600bps Mode to On.

After that, it started working! I’m not sure if this setting will affect other digital modes or not.