Improving streaming SQ


I have an Aurender A10 and stream Tidal and Qobuz.  I'm looking for an easy and cost effective way to to improve streaming sound quality as it seems to fall a little short of my ripped CD's.  Artistic Fidelity makes an ethernet galvanic isolator (GISO GB) that plugs in between the CAT 6 cable and the Aurender.  I'm wondering if any one has tried this or a similar product and what your experience was.  I don't think this product is available in the USA, but I can get one shipped from Germany for 299 euros.  As always, any and all comments are appreciated!
shoff
On the desktop app on my pc is where I found all the info about the Masters setting.
Thx Mr_m.

As you can see from my previous posts it is ONLY to be found on desktop app, it is NOT shown on android app, only 3 choices there, 4 choices on desktop app.
rhljazz,

Thanks again for trying to help.  However, there is no gear wheel in the upper right of MY app, only the search box.  Could this be an iMac vs. PC difference?
My Tidal app is on an iPad and iPhone.  So it appears that the app format is different between pc and portable devices.
Perhaps uberwaltz can point out where the loudness normalization setting exists in the pc format.