I think it depends on the DAC. The idsd has a great usb input and according to darko’s Test also sound good with connected harddisk. A little off-topic, but my current take is: dig out your CD player, dust it off, and connect it to your headphone amp. Best sound I came back to after years of streaming-addiction and enjoyment-neglect. Thing is, you get lost in jumping from file to file and miss the notes. Who has listened to an album end to end recently?? I find that my 18 year old naim dac sounds so sweet that no dac I tested can reach it, neither chord Hugo nor idsd nor myteks. And that is not because they are inferior in their dac element. It’s the chain of Internet->PC->DAC that is weak. Once you have a roon nucleus plus and roon ready dac it may be a different story. But even that has the limitation of no-substance, inflationary, binary listening. Mindful listening longs for a medium that holds it together. Cassette, Vinyl, CD. Guys, time to get physical again