One thing that doesn't seem immediately obvious with the HiFiBerry DAC+ ADC Pro I have is that input and output are separate devices.
I assumed it would be a checkbox or two, but I couldn't mix the input jack into the output without doing it in software, and PulseAudio would drop samples at lower latencies. I admit I didn't troubleshoot this very long though.
MPD, Bluetooth and an AUX input was all I wanted, and I could make it work for scenarios that didn't need the low latency part.
I assumed it would be a checkbox or two, but I couldn't mix the input jack into the output without doing it in software, and PulseAudio would drop samples at lower latencies. I admit I didn't troubleshoot this very long though.
MPD, Bluetooth and an AUX input was all I wanted, and I could make it work for scenarios that didn't need the low latency part.