Apologies if covered elsewhere but what does your post-computer playback chain look like, from computer up to the Philips Little Giant DAC?
I am using the internet service providers modem and router. It is connected thru a long flat ethernet cable to the filter which is connected directly to an older Lenovo i5 business computer with 8-gigs of ram.
I then have a SilkLine Hifi USB to SPDIF converter that filters and re-times the signal before converting it, and sending it to the DAC.
I am currently using Foobar running on PCLinuxOS thru ALSA.