Play Pro
I have launched Play Pro, a paid edition of the MP3 player with a full tagger built in. Play itself stays free.
Pulling my library back out of Google Takeout left me with thousands of files called things like Track 07 (1).mp3, compilations with no artist, and the same song three times over. Play Pro is what I built to sort that out. It works out what each track actually is and writes the correct details back into the MP3 itself, so the fix goes with the file into any player.
Key highlights of this release:
• Identify By Audio: Tag Folder searches MusicBrainz for every track, and anything it can't place by name is identified by its sound through AcoustID. The fingerprint is worked out in your browser; only the fingerprint and track length are sent, never the audio.
• You Approve Every Write: Matches are checked against track length and artist, then sorted into confident, worth a second look, or no match. Review Near-Misses plays each uncertain track while you pick the right version or type the details in yourself. Artist, title, album, year and cover art are written to the file only when you press Write.
• Tidy The Library: Duplicates compares the audio inside each file, so copies that differ only in their tags or artwork are caught, along with the (1) and copy leftovers. Remove gets rid of tracks you don't want, and an Untagged view lists whatever still needs fixing. Nothing is deleted: files go to _duplicates or _removed inside your music folder, with an Undo.
• Enjoy Cover Art: A full-screen view of the current track's sleeve, with an artist panel drawing on Wikipedia and Wikidata. It shows a photo and a short biography, plus formed or born dates, genres, labels and band members past and present.
• Pay Per Song Checked: Credits are used only when a song is looked up, and a song that's already been checked is never charged again. You can try it without an account on the first 20% of a folder, up to 25 songs. Sign in with just your email, and new accounts get 100 songs free. After that, packs are 1,000 songs for £2.99, 5,000 for £5.99 or 10,000 for £9.99. Payment is a one-off through Stripe, credits never expire, and it's UK only at launch.
Writing replaces the MP3 on disk, so point it at a copy of your library until you trust it. Open Play Pro or read how it works.