I’m not sure who is at fault here, the D.Bob or the Rossini, but when connected about once per second for the briefest fraction of a second the Rossini will see the signal as 24/176.4 PCM rather than DSD as denoted by the front panel display, and will switch modes/filters; this will be accompanied by a “tick.”
This happens so quickly the only way I got a photo of the 24/176.4 screen was to take a video and grab a still shot of the frame showing the PCM signal.
This means at first listen the sound seems to be working, but when you get to a quiet portion or silence between tracks, it sounds like low-level static in the audio signal.
I tried both BNC and RCA S/PDIF with different cables, and it’s definitely something in the data stream.
Note this does not happen if I feed DoP from a computer, only via the D.Bob.