I am having mixed results with my SMSL SU-8 DAC. PCM seems to work fine. However, DSD works only with fixed volume or DSP volume. Selecting Device Volume generates just white noise.
DoP with Device Volume works only with the Volume set to 100. Reducing the volume results in silence.
I have created RoPieee logs with unique identifier 91a7cc3fb22c1054
Let me know if I can do any other experiments.