I am in the process of completing 2 HiFi enclosure DACs. Configuration is a 3U metal enclosure with aluminum faceplate. The hardware configuration is RPi 4, Ian Canada DAC, reclocker, isolation, op amp boards, 2 1TB USB drives, optical USB drive, 5" touch screen, USB wifi with ext antenna, front plate USB & headphone jacks, back plate RCA, HDMI, dual USB, etc jacks. One of the DAcs has a CD optical drive, the other is blue ray. The boxes are built, the hardware is operational, so software is the next big issue. The idea is to download MQA files for hard drive storage, stream both audio and video, play back CD/blu ray video and icing on the cake would be surf the web. I have operated both on RPi OS but can’t get them to talk to the DAC stack. So, perhaps Volumio is the answer.