Digital improvements possible?

Thanks for feedback so far, guys!
Erik- I have Vandy 2ceSig 2s and have tried to discern a difference between battery and AC from the wall with my Mac. I have a dedicated power line and Porter Port outlets and can’t tell a difference. Thanks for info on the Stockholm too!

MZ- I’ve wondered about that. There seems to be a lot of hype about hi-Rez, but I’ve not compared it with regular CD quality personally. I do believe Tidal is just as good as CD downloads I’ve done in iTunes. I’ve A/B’d tracks head to head and could tell no difference. I can seem to discern better quality on MQA albums on Tidal versus the same non-master album on Tidal, however. And I have some room treatments for first reflecting points on side walls and behind the speakers. 

I know now some people run JRiver, Roon, etc... is there an advantage sonically?
Since I stream Tidal via WiFi it seems to really slow things down for me. Do I need to upgrade my internet speed?
Any other tips are most welcome. 
Thanks again. 

Thanks for all the input folks!
Erik- someday I hope to run a good quality Ethernet line directly to my MacBook, though our modem is on first floor and my listening room is upstairs. Still, perhaps it would improve SQ over WiFi. 

Brotw- thanks for sharing your experience with Live Dirac- I’ll check it out. I tried Audirvana for Tidal and was unimpressed, but perhaps it was a processing issue with my Mac. At the time I hadn’t upgraded memory on my laptop. Now I have more. 

Mahler123- I have an Osyssey Kismet stereo amp and a JE Labs 6sn7/76 tube based linestage. I think it pairs pretty well with the Vandys.