What Enrich Data fills in, and what it never touches
Artwork, biographies, classical details and album identification. Never your own tags.
Sync copies what your server knows. Enrich Data fills in what your files do not carry: artist, composer and orchestra artwork, biographies, classical work and movement details, and album identification.
It is non-destructive. Your own tags are never overwritten. If you have enriched before, a second run fetches only the gaps and anything new or changed. It does not re-download what you already have.
Most of it comes from Serento's own database. A few things, such as artist and composer portraits, come from slower external sources, so expect the first run on a large library to take a while and to fill in progressively rather than all at once.
It runs from Settings → Libraries, on the server entry. It also resumes: if it is interrupted, including by leaving the app, it carries on from its checkpoint rather than starting over.
Still stuck
Write to us with your server, your streamer and what you expected to happen. If you can, send the diagnostic log from Settings, it usually answers the question faster than a description can.