nightingale

What it does

Scans a folder — or Plex, Jellyfin, Navidrome — separates vocals from the instrumental, transcribes the lyrics with word-level timing, and plays it back with synced highlighting, pitch scoring and key/tempo control. Ships as a single binary that bootstraps its own dependencies. Keep it to music you legally own and to private use: processed tracks aren't yours to broadcast or play in a venue. Transcription mishears, and some mixes don't separate cleanly. GPL-3.0.

Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.

Screenshots & visuals

Before you start

• Setup difficultySome setup needed
• Command lineRequired
• API keyNot required
• Sends data onlineYes

Judged automatically from the project's own metadata. Always confirm on the official page.

nightingale FAQ

Is nightingale free?

Yes. It runs on your own machine, so there is no usage-based cost either.

Do I need to install anything or write code to use nightingale?

It needs the command line. If you are not comfortable typing commands, expect to get stuck during setup.

Does nightingale work on a phone?

No. It needs a computer.

Can I use nightingale commercially?

The licence is GPL-3.0. Using it commercially is fine, but if you distribute something built on it you may be required to release that under the same licence. Keep it internal, or check before distributing.

How it compares

The conditions that decide whether you can actually use it, side by side.

"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.

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