meta-sonata 0.1.1

Automatically fetch and safely complete music metadata, cover art, and synced lyrics from the CLI.

meta-sonata

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Automatically fetch and fill missing music metadata, cover art, and synced lyrics for your music folders. Preview the changes, then apply them with one command.

Two Commands

Query and preview the metadata meta-sonata finds. Nothing is written:

meta-sonata enrich "/music/album"

Fetch and write metadata, cover art, and lyrics in one step:

meta-sonata enrich "/music/album" --write

Both commands accept an album folder or a larger music directory. Existing tags, filenames, and folder structure are trusted first; online sources fill the gaps.

Why meta-sonata?

• Local first: existing tags, folder names, and track structure anchor the match.
• Conservative: track count, duration, live/studio, and ambiguity checks prevent risky writes.
• Complete: metadata, cover art, and synced lyrics in one command.
• Automation-ready: dry runs, external incremental state, recursive discovery, and JSON audit plans.

Quick Start

pipx install meta-sonata

Or install it with uv:

uv tool install meta-sonata

Typical output:

scan: root=/music/album files=12 album_groups=1 loose_tracks=0 max_depth=3
resolve: 1/1 /music/album
lyrics: 1/1 /music/album
dry run: 1 plan(s)
- album: Artist / Album: artist=Artist  album=Album  year=2006  tracks=12  confidence=0.96  lyrics=11/12
nothing written; pass --write to apply

enrich enables metadata lookup, cover lookup, and lyrics by default. It scans up to three directory levels; use --max-depth N or --recursive when needed.

What It Can Fill

Area	Fields
Identity	title, artist, album artist, album, track/disc number
Release	date, label, catalog number, barcode, release type
Sources	MusicBrainz release/track IDs and provenance tags
Media	embedded cover art, synced LRC, plain lyrics

Album metadata sources: MusicBrainz, iTunes, and NetEase.

Lyric sources: QQ Music, NetEase, KuGou, KuWo, and Migu.

meta-sonata sources

Put It in a Pipeline

Run it after download/extraction/CUE splitting and before the final library sync:

meta-sonata enrich "/staging/new-music" \
  --changed-only \
  --state-dir "/var/lib/meta-sonata" \
  --write

Incremental state stays outside music folders. No marker files are added to albums.

Optional Metadata Browser

meta-sonata web "/music" --host 127.0.0.1 --port 8765

Open http://127.0.0.1:8765/ to browse audio files, core tags, source IDs, technical details, covers, and embedded lyrics. The web UI has no write endpoints.

Shown with generated silent FLAC demo files and public-domain work metadata.

Safety

• Every write command is a dry run unless --write is present.
• Low-confidence lyrics and ambiguous release identities are skipped.
• Mixed loose tracks are not forced into a fake album.
• Real libraries can be protected with META_SONATA_PROTECTED_PATHS.
• Tests generate silent FLAC files; no copyrighted media is committed.

More

• Detailed guide
• Changelog
• Public test-fixture policy
• MIT License

Python 3.9+ is supported. The project is currently an early 0.1.x release; unofficial provider endpoints may change or be rate-limited.