How do I switch from Wi-Fi to Ethernet cables?

@cleeds You and fredrik222 are both correct...The term "Streaming" is a term we’ve all come to understand and accept as movies or audio distributed via the internet or satellite. However streaming in a truer sense is AM FM radio or analog TV. no caches etc. You hit the nail on the head by stating "Qobuz, Tidal, Spotify all use streaming protocols". To crumble up the differences between radio transmission and internet/sat transmission a perfect marketing tool was required hence "Streaming" and to go any deeper would make the average persons head explode to crumble up the differences,not only that the intellectual curiousity isn’t there in the first place.

balooo2

... streaming in a truer sense is AM FM radio or analog TV ...

No, broadcasting is not streaming and downloading is not streaming either. Streaming is a specific protocol. These words have specific meanings, there's no need to redefine them.

A good example of what @balooo2 o2 is referencing can be seen by going to a YouTube video on right clicking on the screen. This pops up a box and then click stats for nerds. This brings up a data box and one of the stats is buffer health. While we all agree that Youtube is streaming, it downloads 10 to 60 seconds of video in the buffer (local memory) and then plays from the buffer. In the very rare event that your computer receives data with an error, the software simply requests that data be resent and fills it into the buffer. I am not sure how Qobuz handless their streaming / downloads but the theory is the same. I have read that for Qobuz a user an adjust the buffer size.  For some services, an entire song on your playlist can be stored locally.

I just moved the modem.  Might be the easiest solution.

Your best bet is to pull your modem out of the basement.  Have your ISP  company move it , thats a horrible spot for Access Point.     If you cannot  do that have someone run Cat6 in the walls to a spot where you can put the Router within the main living area.    The Wifi should be good enough if you pull it from the basement.  You can then also get a switch or use the RJ45 connections on the router to run the cable to the Blue Sound once you move it.

Do not use repeaters they are garbage and never work.  Repeaters half the bandwidth and you will have drop outs.  Even many of the consumer Mesh systems are just fancy repeaters unless they have three radios in the devices to connect. None of that will solve your issue and you might as well just stick with Wifi.  

What router are you using?  is it your providers?  Make sure its the latest as most ISPs provide WiFi6 routers these days.  if not get a Wifi6 router.