So to answer your original questions, it is possible to use foobar2000 for streaming single rate DSD files and you were likely either using the wrong (ie, foo_out_upnp) plugin o you hadn't configured the foo_upnp plugin properly for DSD streaming support. The audio engine only produces a PCM audio output signal since it is currently independent of the foo_input_sacd plugin component that provides foobar2000 with its DSD decoding support. The foo_out_upnp plugin, as its name suggests, provides the foobar2000 audio engine's own output as a continuous PCM stream (with the option of it being either as raw LPCM or contained in a WAV file or encoded as a FLAC file), rather than the individual audio file tracks themselves. That DSD file streaming support was a bit of a hack, anyway, implemented on the UI by adding the 2822400 upper limit setting to the PCM sample rate range, in the plugin's UPnP/DLNA media server Streaming Profiles settings configuration screen! The limit is there because the plugin's developer has never updated the plugin for DSD file streaming, since providing the initial support, which was single rate at the time. Regarding foobar2000, there are two plugin components that provide it with UPnP/DLNA capabilities, foo_upnp and foo_out_upnp, but only the older currently unsupported foo_upnp plugin supports native streaming of DSD files and that's limited to single rate DSD at 2.8MHz aka DSD64. Is this even possible? Or is there some element of the DLNA standard that prevents me from 'pushing' a DSD/DSF file over LAN to a renderer that can play it? Or is Foobar just not the right program to use? Obviously (I think) the WASAPI and ASIO approach isn't for my setup. I've used the UPnP and DSD/SACD components, but still not having any luck. I had a modicum of success with Foobar and the Oppo a while back, but now I think that Foobar was converting to PCM before pushing the files over to the Oppo. I don't have a standalone DAC, so the USB route isn't in the cards. I'm struggling to use my PC as a DLNA controller to play high-res audio files over LAN to either my Oppo 103 or Marantz 7010.

Jriver dsd