I would like to correct some inaccuracies in my previous statements.
The ReplayGain options in foobar2000—none, track, album, by playback order—correspond to Symfonium’s Off, Prefer Track (Album fallback), Prefer Album (Track fallback), and Automatic, respectively, as indicated by the marked options in the image.
The implementation of foobar2000’s ReplayGain functionality is as follows:
- Track mode: Track gain takes precedence (including 0.00 dB). If track gain does not exist, it falls back to album gain, and if neither exists, no gain is applied.
- Album mode: Album gain takes precedence (including 0.00 dB). If album gain does not exist, it falls back to track gain, and if neither exists, no gain is applied.
By default, foobar2000 uses album mode.
For reference.