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Revision as of 08:28, 14 July 2018
Replay Gain
Replay gain will automatically adjust the volume of the currently played song, relative to other songs, as determined by the person who encoded the audio file. To enable replay gain, see Settings menu.
To handle this, Amarok relies on metadata embedded in the audio file:
- If no replay gain information is embedded, Amarok will not adjust the volume
- If replay gain information is found, it will be written into Amarok's database
Under afspilningen vil Amarok finde denne information i sin egen database. Ændringer af metadata bliver ikke altid skrevet til databasen under en opdatering af samlingen (fx hvis replay gain slettes fra en fil).
Dette kan føre til uventet opførsel: Numre med den samme kunstner blive afspillet med forskellig lydstyrkeniveauer etc.
Bruges replay gain?
For at finde ud af, om problemer med lysdtyrken skyldes replay gain eller en dårlig indkodning:
- Deaktiver replay gain (se ovenfor)
- Start Amarok i debugtilstand og søg efter output relateret til gain:
amarok -d --nofork | grep gain
Hvis replay gain er aktiv for det afspillede nummer, så er outputtet
Using gain of -10.28 with relative peak of -1
Se information om replay gain
For .flac-filer kan du bruge "metaflac" til at se indlejrede data til replay gain:
metaflac --list Millencolin\ -\ Balanced\ Boy.flac
Blandt andre ting vil dette vise noget i retning af:
METADATA block #2 type: 4 (VORBIS_COMMENT) is last: false length: 390 vendor string: reference libFLAC 1.2.1 20070917 comments: 14 comment[9]: REPLAYGAIN_REFERENCE_LOUDNESS=89.0 dB comment[10]: REPLAYGAIN_TRACK_GAIN=-1.55 dB comment[11]: REPLAYGAIN_TRACK_PEAK=0.75894165 comment[12]: REPLAYGAIN_ALBUM_GAIN=-4.19 dB comment[13]: REPLAYGAIN_ALBUM_PEAK=0.98712158
For at se denne information om nummeret i Amaroks database:
select id, title, albumgain, albumpeakgain, trackgain, trackpeakgain from tracks where title like "Balanced%";
viser
+-------+------------------+-----------+---------------+-----------+---------------+ | id | title | albumgain | albumpeakgain | trackgain | trackpeakgain | +-------+------------------+-----------+---------------+-----------+---------------+ | 10459 | Balanced Boy | 0.53 | -5.60297 | 0.44 | -5.60297 |
Bemærk forskellen i loudness-niveauer
Slet replay gain-information
Slet først matadata fra filen:
metaflac --remove-replay-gain Millencolin\ -\ Balanced\ Boy.flac
Opdater herefter din samling i Amarok. Hvis den stadig bruger replay gain, så opdatér databaseposten:
update tracks set albumgain=-1,albumpeakgain=-1,trackgain=-1,trackpeakgain=-1 where id=10459
Genstart Amarok; nu skulle loggen vise, at de opdaterede værdier bliver brugt.
Prøv bare at rode med værdierne manuelt for at forbedre lydstyrkeniveauerne.