Sounds like an expensive solution. For $99 you could get a Raspberry Pi that will do the exact same thing. Or as others have said, grab a used AirPort Express.
Do you have a Raspberry Pi setup? I've been trying to utilize Spotify in my system, an Iphone SE sounds OK, even with the Lightning to 3.5mm Apple cheap DAC, the improvement is marginal, an Apple TV is worse sounding, and internet radio stations sound horrible on the Apple TV. However the audio quality through my mid-2015 Macbook Pro, a simple 3.5mm to RCA jack connection, Spotify through the Chrome web browser, the sound quality is great, a noticeable improvement over the Iphone SE first generation, problem is I'd like to replicate that sound quality without having the need to turn on the Macbook Pro.
Seems like a Raspberry Pi 4 with a HiFiBerry Dac 2 HD could be one solution, if you or others can chime in on this or other options, it would be appreciated, thank you.