LyricsPlus (KPOE): word-by-word synced lyrics with multi-server failover, converted to enhanced LRC. ReplayGain: standalone EBU R128 (re)scan writing REPLAYGAIN_TRACK_* tags via native writers or FFmpeg, with batch action in queue/album screens and SAF support.
New lyrics providers using Paxsenix API:
- Spotify: Synced lyrics from Spotify
- Deezer: Synced lyrics from Deezer
- YouTube: Lyrics from YouTube
- Kugou: Lyrics from Kugou (Chinese service)
- Genius: Plain text lyrics from Genius
Implementation:
- Add lyrics client implementations for all providers
- Smart search result scoring based on track name, artist, and duration
- Support for both synced (LRC) and unsynced lyrics formats
- Fallback search with simplified track names and primary artist
UI updates:
- Add provider entries to lyrics priority settings page
- Add display names for new providers in settings
The HIGH-quality lossy format picker can now produce an AAC/M4A 320 kbps output alongside MP3 and Opus. FFmpegService.convertM4aToLossy/convertAudioFormat, the Dart queue pipeline, the Kotlin finalizer, and the library database format helper all route .m4a through a unified aac codec path and tag the resulting file with the M4A metadata writer. The Lossy Format setting gains a new option, and the track metadata convert dialog lists AAC next to the other targets.
Apple Music lyrics gain a 'eLRC word sync' switch (default off). When disabled the pax-to-LRC formatter strips inline word timestamps, producing line-synced LRC that is safer for players that choke on eLRC; enabling it restores the previous word-by-word behaviour. The change propagates through SetLyricsFetchOptions and invalidates the global lyrics cache on toggle.
Broad l10n migration: roughly 400 previously hardcoded English strings across queue, settings, track metadata, repo, audio analysis, setup and extension screens now live in the ARB catalog, with matching plural/placeholder forms. No behaviour change beyond localisation. Existing and new unit tests (lyrics eLRC toggle and Dart settings round-trip) pass.
- Replace hardcoded provider prefix checks with resolveEffectiveMetadataProvider using replacesBuiltInProviders manifest capability
- Add preparing/downloading/finalizing progress status constants and SetItemPreparing/SetItemDownloading APIs
- Expose setDownloadStatus to extension JS runtime for fine-grained progress control
- Skip lyrics search for instrumental tracks detected by title heuristic
- Pass tidal/qobuz IDs to extension checkAvailability for richer matching
- Add shouldAbortCancelledFallback helper for robust cancellation propagation
- Add resolvePreferredTrackIDForExtension for intelligent track ID selection per extension
- Remove ambiguous Auto/Default search provider option, always resolve to concrete provider
- Add tests for shouldAbortCancelledFallback and progress status transitions
Resolve API (api.zarz.moe):
- Refactor songlink.go: Spotify URLs use resolve API, non-Spotify uses SongLink API
- Add SongLink fallback when resolve API fails for Spotify (two-layer resilience)
- Remove dead code: page parser, XOR-obfuscated keys, legacy helpers
Multi-artist tag fix (#288):
- Add RewriteSplitArtistTags() in Go to rewrite ARTIST/ALBUMARTIST as split Vorbis comments
- Wire method channel handler in Android (MainActivity.kt) and iOS (AppDelegate.swift)
- Add PlatformBridge.rewriteSplitArtistTags() in Dart
- Call native FLAC rewriter after FFmpeg embed when split_vorbis mode is active
- Extract deezerTrackArtistDisplay() helper to use Contributors in album/playlist tracks
Code cleanup:
- Remove unused imports, dead code, and redundant comments across Go and Dart
- Fix build: remove stale getQobuzDebugKey() reference in deezer_download.go
- Delete dead metadata client and extract shared types to metadata_types.go
- Remove Yoinkify download fallback from Deezer, use MusicDL only
- Clean up retired settings fields and metadataSource
- Remove dead l10n keys for retired provider
- Add migration to strip retired provider from existing users' lyrics config
- Fix M4A/ALAC scan silently failing on Samsung by adding proper fallback
to scanFromFilename when ReadM4ATags fails (consistent with MP3/FLAC/Ogg)
- Propagate displayNameHint to all format scanners so fd numbers (214, 207)
no longer appear as track names when /proc/self/fd/ paths are used
- Cache /proc/self/fd/ readability in Kotlin to skip failed attempts after
first failure, reducing error log noise and improving scan speed on Samsung
- Fix Qobuz download returning wrong album cover when track exists on
multiple albums by preferring req.CoverURL over API default
- Fix FFmpeg M4A metadata save failing with 'codec not currently supported
in container' by forcing mp4 muxer instead of ipod when cover art present
- Clean up FLAC SAF temp file after metadata write-back (was leaking)
- Update LRC lyrics tag to credit Paxsenix API
- Remove log message truncation, defer to UI preview truncation instead
- Extract normalizeOptionalString() to lib/utils/string_utils.dart from download_queue_provider and track_metadata_screen
- Extract PrioritySettingsScaffold widget from lyrics and metadata priority pages, reducing ~280 lines of duplication
- Extract _ensureDefaultDocumentsOutputDir/_ensureDefaultAndroidMusicOutputDir in download queue provider
- Extract collectLibraryAudioFiles() and applyDefaultLibraryMetadata() in Go library_scan.go
- Extract plainTextLyricsLines() in Go lyrics.go, used by Apple Music, Musixmatch, and QQ Music clients
- Add configurable YouTube Opus (96-256kbps) and MP3 (96-320kbps) bitrates
- Improve title matching with loose normalization for symbol-heavy tracks
- Add SpotubeDL engine v2 fallback for MP3 requests
- Improve filename sanitization in track metadata screen
- Bump version to 3.6.9+82
- Detect error JSON payloads from Apple Music and QQMusic proxies
- Add lyricsHasUsableText validation for usable lyrics content
- Skip empty word lines in synced lyrics parsing
- Add ClearAll method to lyrics cache
- Handle TimeoutException properly in track metadata screen
- Add laflame to recent donors list
- Add getLyricsLRCWithSource to return lyrics with source metadata
- Display lyrics source in track metadata screen
- Improve LRC parsing to preserve background vocal tags
- Add dedicated LyricsProviderPriorityPage for provider configuration
- Add Paxsenix as lyrics proxy partner for Apple Music/QQ Music
- Handle inline timestamps and speaker prefixes in LRC display
Changes:
- Fix FFmpeg crash issues during M4A to MP3/Opus conversion
- Add format picker (MP3/Opus) when selecting Tidal Lossy 320kbps
- Fix Deezer album blank screen when opened from home
- LRC file generation now follows lyrics mode setting
- Version bump to 3.3.5 (build 70)
- Refactor EmbedM4AMetadata to use streaming instead of loading entire file
- Use os.Open + ReadAt instead of os.ReadFile for memory efficiency
- Atomic file replacement via temp file + rename for safer writes
- New helper functions: findAtomInRange, readAtomHeaderAt, copyRange, buildUdtaAtom
- Refactor GetM4AQuality to use streaming with findAudioSampleEntry
- Use NewHTTPClientWithTimeout helper in lyrics.go, qobuz.go, tidal.go
- Update CHANGELOG with performance improvements and MP3 metadata support
- Add lyrics mode setting (embed/external/both) for saving lyrics
- Implement SaveLRCFile() in Go backend for all providers (Tidal, Qobuz, Amazon)
- Fix locale parsing in app.dart to handle country codes (e.g., pt_PT -> Locale('pt', 'PT'))
- Change Portuguese label from Portugal to Brasil in language settings
- Add extension manager, manifest, runtime, providers, settings
- Add extension provider and UI pages (extensions, detail, priority)
- Add download service picker widget
- Add metadata provider priority page
- Add source field to Track model for extension tracking
- Add skipBuiltInFallback manifest option to skip built-in providers
- Update download queue to use source extension first
- Add extension upgrade support without data loss
zarzet