MC will convert 2.8 MHz DSD to 352 KHz PCM. To down convert further, you need to put the final sample rate in the 352 KHz line.
This has been an puzzle for me. I originally changed output to every available PCM DSF choice (leaving sampling choices alone in DSP Studio) and my speakers were silent when I played an audiophile DSD Hi Res tune. Then I tried MP3 and it worked. I checked my receiver and it was receiving MP3.
Strangely - I had to watch for MC switching the Audio Path on me. If I was testing DLNA....MC would sometimes flip back to my USB DAC.
Lastly I changed the last sampling rate (>768,000 Hz) to 768,000 and type from MP3 to DSF and it worked - beautiful music was everywhere !!!
My receiver was showing DSD at 2.8MHz (which is the maximum allowed by the receiver).
I hate when things work and I have no clue what I just did. While I was typing this I had a two second really annoying dropout. I'd rather have no sound than dropouts.
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My Marantz allowable DLNA inputs is attached from the manual.