Connect the LAN iSilencer between your broadband router and network audio streamer to remove electrical noise that distorts the audio signal.
ifi-audio.com
Hmmmm.
I assume this is a digital isolator.
When I designed and built my ADC, i put a digital isolator on the 24MHz i2s digital line, my noise floor dropped 27dB. The other massive noise reduction was down to power supply noise reduction and groundloop elimination. My resulting ADC currently has a noisefloor of about -150dBV to -160dBV. I can get more out of it but for now it outclasses my audio equipment
It has 3 linear supplies planned, each with a LT3080 LDO regulator for helping attack any mains noise, then the power rails on ly PCBs have PI filters with inductors and caps decoupling plus shielding means the design keeps the digital clock noise far away from the analogue.. -160dB is orders of magnitude quieter than -120dB as db is logarithmic.
Will this work? Well it should isolate but there’s probably more sources of noise (power and the power supply design) that dictate noise floor..then you have all the other distortion to remove.. all depends if the designers of your audio equipment cheaped out.. if they cheaped out on isolation the they would have cheaped out on the design of the system and the respective power supplies.