How do I add album artwork to FLAC or MP3 files?

Open the files in Waketag and use the artwork and metadata tools to find or set the correct cover, then save the edited files. Reopen a saved file to check the embedded result. Test it in your intended music player too: a player may show a cached image or have different support for artwork fields and image formats.

Steps to follow

1. Select a representative file and identify the correct release so the cover does not come from an unrelated reissue.
2. Use available artwork tools, save the edited file and reopen it to confirm the image was stored.
3. Inspect that exact saved copy in the intended player before applying the same cover across the album.

Distinguish embedding from a cached display

A player can keep showing old artwork even after tags change. Confirm the saved file in Waketag first, then refresh or re-import it in the player if necessary. Different players handle artwork differently, so a successful one-file test is more useful than assuming universal display.