Ready For Digital Source...Computer?

I have speakers and amplification all figured out, now I need a source. No vinyl and not concerned with CD's at this point.
Only steaming online. No Roon either, been there, done that. 

Honestly, (because I need a new computer anyway) I would really like to use a computer to play Spotify (hopefully CD-quality soon), Tidal, Qobuz, etc. but most say a computer is too "Noisy" to use for this purpose. Although, I have heard there are ways around this.

Rather than having to purchase a dedicated music server, does anyone know how to set up a computer as a high-quality music server? I can't really seem to find anything online.

Thanks