ReplayGain 2.0 values (gain to -18 LUFS, linear peak) derived from the
stored track and album loudness:
- Web: GET /api/tracks/replay-gain?ids=... (up to 200), a lookup the
player calls for its queue, rather than a field on every TrackRef
surface.
- Android: track_gain/track_peak and album_gain/album_peak on the sync
views, so cached tracks level offline. Storing a measurement logs a
track change, and an album's values moving logs an album change, both
before the write (#2704), so caches pick the gains up.
- OpenSubsonic: replayGain on every song (album, getSong, search3,
starred), as a JSON object and an XML element.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
