Just a quick thing - there is no ‘computer’ in the SQ, it does not run on Linux, nor does it have USB drivers to change/update. SQ-Drive is a hardware solution interfacing with a system which we built from the ground up. Huge benefits for stability, efficiency, performance and audio quality of course, but not so trivial (as some appear to believe it might be @Dilettant 
) to add in consumer formats/multimedia.
Hence the ST3 3.5mm stereo jack port, which along with the other (balanced) stereo inputs and USB-B connection allow you to easily connect any common playback/background music device.
Not saying it’s not a fair suggestion though, just that it may not be technically possible (couldn’t say without R&D investigation).
Cheers,
Keith.