I have an analog system in one room. it does not have any TV/monitor hooked up to it. I would like to inexpensively play music I have ripped into FLAC format on a windows computer in another room. I have also copied those FLAC files to a 256 GB USB 3.0 thumb drive. Occasionally I have hooked a notebook computer to a 1/8" headphone jack with RCA output to aux in on the tube preamp, but I use the notebook computer elsewhere & it is a PITA. I understand bluetooth is not high quality (I may be misinformed on this).
I do not have a wired ethernet connection at this location, but wireless is available.
So without selling any body parts what is the best option to allow me to play the digital sources (I don't do Spotify, Tidal or the like) I currently have?