Earlier quoted context omitted.
Navidrome has worked well for me for the last couple years. My collection (~80 GB) is pre-organized FLAC but Navidrome will transcode to MP3 if needed. I use Substreamer on Android to connect to it (Airsonic API/protocol) or the WebUI at home or work. Just the right balance of simplicity and features for me.
How do you tell navidrome to serve "preorganized" flac. That is exactly my case.
MusicFolder = "/home/vlad/music"
And you're off to the races. The docs even say that this can be a read-only folder, which it is in my case.