Currently I am using a Pi 4 with DigioOne HAT going to a Khadas ToneBoard DAC. Am I correct in assuming that the SMSL SU-9 will only decode MQA with the USB and not the optical In from the DigiOne? If so, have you noticed any noise introduced by the USB to SMSL SU-9 vs optical
I’m likely not qualified for DAC comparisons as I’m one that finds diminishing returns after about $400… I upgraded from my iFi Zen DAC because iFi has an issue with gapless MQA playback so I got the SU-9 mainly as an alternative but also because it has fixed volume output compared to their M500.