Media and path mapping
Let Soundwaves recognise your audio files, even when the Relay runs on a different machine.
Media scan
Soundwaves needs to recognise the actual audio files on your machine, not just their titles. The Relay does this with a media scan: it walks the folder you point it at, fingerprints the files it finds, and matches them to the tracks Soundwaves already knows about.
To turn it on, set a media folder in the Relay's media settings. Leave it blank to keep it off.
On a fresh station, the scan reports every file as skipped until your library is in. Run the library import first.
Path mapping
Most of the time, the media scan is all you need. Path mapping only matters when the Relay runs on a different machine from the one that stores the paths in your playout database.
Playout systems on Windows record files as network share paths, for example \\vault.example.com\music\track.mp3. If the Relay runs on that same Windows machine, those paths resolve as-is and no mapping is needed.
But if you run the Relay on a Mac or Linux box, that same shared drive is usually mounted somewhere local like /Volumes/music or /mnt/music. In that case, add a path mapping in the advanced media settings that says "\\vault.example.com\music here is /Volumes/music there."
The Relay then translates between the two automatically, so it can reach your files while your playout system keeps using its original paths.