So, I have a Pro-Ject Pre Box S2 Digital (which supports sample rates up to 768 kHz,) and when I attempt to use JRiver's on-the-fly conversion of DSD to 352.8 kHz, I get an error saying "Playback could not be started on the output 'Direct Sound' using the format '352.8 kHz 2ch.' This confuses me a bit because I actually have the DAC set to this sample rate in Windows.
In addition to this, if I attempt to play a DSD file and I get this error, it won't let me play any other file in JRiver until I change my sample rate to a different one, then back to 352.8 kHz. This doesn't occur at any other sample rate, and the program tells me that playing a DSD file at 176.4 kHz would work, then it gives me the same "Playback could not be started" error.