I've received my dac+dsp board yesterday, mounted it on my Pi 3B+ and connected the RCA outputs to the amp. The installation of HifiberryOS went flawless. But, I'm unable to get any sound out of the analog outs (Toslink works without problems). I've tried to install several DSP profiles (default V11 and V12, noautomute), what didn't change anything, So I've tried several other distros (volumio, moodeaudio) to no avail...
do anyone has a helpul hint? May I've got a DOA?
thanks in advance and best regards