Smart synced-lyrics fetcher for Android — built for music with bad or missing metadata.
Point it at a folder of local music (even messy SnapTube/YouTube rips with broken tags) and it
finds time-synced .lrc lyrics for every song, using a confidence-scored multi-strategy
matching engine — plus a built-in Samsung-Music-style lyrics player.
Install · What makes it different · Providers · Build · Credits
| Question | Answer |
|---|---|
| What is it? | An Android app that finds time-synced lyrics (.lrc) for your local music |
| What's special? | It works on music with wrong or missing tags — filename parsing, noise stripping, and duration-based confidence scoring find the right match |
| Setup? | None. No account, no API keys — the default provider (LRCLib) is free and open |
| How do I use it? | Pick your music folder → tap Batch download lyrics → done |
| Bonus | Built-in synced-lyrics player with live highlighting and an offset fine-tune slider |
| Origin | A heavily reworked fork of SongSync (GPLv3) |
Most lyric apps just send your (often wrong) tags to a provider and accept the first result. MusicResync doesn't:
- Multi-strategy candidate ladder — tries tags, then
Artist - Title/Title - Artistfilename parsing, primary-artist extraction (Coby X Teodora→Coby), remix/version loosening, and a title-only fallback. - Noise stripping — removes
(MP3_320K),(Official Video),[HD],ft. …, track numbers, underscores, and other junk before searching. - Confidence scoring (title 40% · artist 30% · duration 20% · album 10%) with a duration tiebreak — the track length from your file is matched against each candidate, so the right song wins and a wrong "first result" (e.g. a random remix) is rejected.
- Tiers: ≥85% auto-accept · 60–84% verify · <60% manual.
On a real corpus of messy SnapTube rips this lifts the auto-match rate from ~50% to 75–80% — including non-English tracks — before any manual work.
SnapTube saves lyrics as Song(MP3_320K)_private.lrc, which players like Samsung Music ignore because the name
doesn't match the audio. MusicResync detects these on load and strips the _private suffix automatically —
no network needed. Songs that already have correct .lrc files land straight in Has Lyrics.
Tap any song with lyrics to open a Samsung-Music-style player: your audio plays while the current lyric line highlights and auto-scrolls. An offset slider lets you fine-tune timing — adjusting it seeks the track ~2.5s back so you immediately hear and see whether the new offset lines up.
- Tabs: All / Has Lyrics / No Lyrics with live counts and green/red note indicators per song.
- A centered Batch download lyrics button: one tap fetches lyrics for everything that needs them.
- Pre-batch dialog keeps the two choices that matter up top (skip songs that already have lyrics,
save
.lrcnext to the song); everything else (embed into the file, correct the metadata, auto-try other providers) lives under a single More options section.
Every request uses exponential backoff + jitter (1→2→4→…→30s) with retries and a hard timeout, plus graceful fallback: if your selected provider errors or times out (e.g. a Spotify API change), MusicResync quietly falls through the others instead of throwing an error at you.
| Provider | Auth | Notes |
|---|---|---|
| LRCLib (default) | none | Returns duration + lyrics in one request |
| Netease | none | Strong non-English coverage |
| Apple Music | none | Best-effort fallback |
| Spotify | none | Rotating keys fetched from several independent mirrors, cached locally |
| QQ Music | none | Best-effort fallback |
None of this blocks app launch — a provider going down never breaks the app.
- Grab
MusicResync-vX.Y.Z.apkfrom the latest release. - Sideload it (enable install from unknown sources). Android 5.0+ (minSdk 21).
- On first launch, grant All files access so the app can read your music and save
.lrcfiles next to it.
No setup or API keys required — LRCLib (the default) needs no account. MusicResync uses its own package id, so it installs alongside (not over) the original SongSync.
Requires the Android SDK and JDK 17–21 (Android Studio's bundled JBR works well).
git clone https://github.com/DynamycSound/MusicResync
cd MusicResync
./gradlew :app:assembleDebug # APK in app/build/outputs/apk/debug/
./gradlew :app:testDebugUnitTest # run the matching-engine unit testsThe matching engine (app/.../util/matching/) is pure Kotlin and unit-tested on the JVM against real filenames
and the live LRCLib API — no emulator required to validate it.
Releases are built and signed by CI with a committed disposable keystore (it exists only so updates install over each other — it protects nothing and signs nothing official).
MusicResync is a fork of SongSync by Lambada10 and contributors — huge thanks for the foundation. Provider integrations are inspired by syncedlyrics and spotify-lyrics-api.
Licensed under the GNU General Public License v3.0, the same as the original SongSync. See LICENSE.