When Media Center converts DSD to PCM it does so by a factor of 8. So, 2.8 MHz DSD goes to 352 MHz PCM, 5.6 MHz DSD to 705 MHz PCM, and 11.2 MHz to 1410 MHz. In DSP Studio - Output Formatting you then need to set the conversion to your final desired sample rate. So, if you want 176 Khz PCM as your final rate, you need to put 176 KHz in the conversion lines for 352 Khz and 705 KHz and also in the >768 KHz line. I would suggest 176 Khz or 88 Khz, since they are integer multiples of the original PCM rate and that makes the conversion more efficient than a non-integer conversion like 192 Khz.
You should also check to be sure SoX is selected for downsampling in the Audio options section. I am not sure if it currently defaults to that or not. It is much more efficient than the old converter in doing the PCM conversion.
As part of the conversion, a large amount of high frequency noise is generated that has to be filtered out. By default, a low pass filter is applied. The default is a filter at 24 Khz with a slope of 48 dB. This is a conservative filter and works for most people. The Sony standard was 50 Khz with a slope of 48 KHz. Unfortunately, that is not an option, but you can set one like that in DSP Studio, if you turn off the default filter in Audio - Advanced - Configure Input Plugin - DSD. Only do that if you set an appropriate low pass filter in DSP Studio. If none of this makes sense, just leave the default alone.