Normalize mp3 volume level: Difference between revisions

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[[Category:Ubuntu Audio]]
[[Category:Ubuntu Audio]]
[[Category:201102]]
[[Category:201102]]
== RVA ==
* http://normalize.nongnu.org
With the following command volume information is stored in every selected mp3 so that a player with support for RVA (Relative Volume Adjustment) can play the mp3 at a normalized level. The encoded audio itself is not altered. With option '-m' an average volume level is calculated over the collection of files first to use as the targeted relative average volume.
Note: your mp3 player needs to support RVA.
<syntaxhighlight lang=bash>
sudo apt-get install normalize-audio
normalize-audio -m -v *
</syntaxhighlight>
If your mp3 player does not support RVA you can use the following statement. The following command will adjust the volume by de-coding the mp3 to WAV using the RVA volume adjustment and then it is re-encoded to 128 bit mp3 (change this if you like).
Note:
* you need 'lame' and 'mpg123' codecs
* depending on the size can take a lot of drive-space and time
* your mp3 files will have the same bitrate
* you will loose some quality in the process - using a higher bitrate you still will loose some quality AND disk space as well.
<syntaxhighlight lang=bash>
sudo apt-get install mpg123
normalize-mp3 -m -v --bitrate 128 --mp3encode="lame -h -quiet --preset %b %w %m" *
</syntaxhighlight>


== ReplayGain ==
== ReplayGain ==
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* http://manpages.ubuntu.com/manpages/hardy/man1/mp3gain.1.html
* http://manpages.ubuntu.com/manpages/hardy/man1/mp3gain.1.html


ReplayGain is a different standard for almost the same thing. One difference is that it doesn't have to calculate an average over a collection of mp3's because ReplayGain tunes all music to an 'universal volume level'. To enable ReplayGain in Rhythmbox musicplayer: in the menu go to Edit, Plugins and check 'ReplayGain' you can also set preferences.
ReplayGain is a different standard for almost the same thing. One difference is that it can't calculate an average over a collection of mp3's, it tunes all music to an 'universal volume level'. To enable ReplayGain in Rhythmbox musicplayer: in the menu go to Edit, Plugins and check 'ReplayGain' you can also set preferences.


Note 20130628: this setting seems to have no effect in Rhythmbox.
Note 20130628: this setting seems to have no effect in Rhythmbox.
Line 38: Line 62:
<syntaxhighlight lang=bash>
<syntaxhighlight lang=bash>
mp3gain -r -k -p *
mp3gain -r -k -p *
</syntaxhighlight>
== RVA ==
* http://normalize.nongnu.org
With the following command volume information is stored in every selected mp3 so that a player with support for RVA (Relative Volume Adjustment) can play the mp3 at a normalized level. The encoded audio itself is not altered. With option '-m' an average volume level is calculated over the collection of files first to use as the targeted relative average volume.
Note: your mp3 player needs to support RVA.
<syntaxhighlight lang=bash>
sudo apt-get install normalize-audio
normalize-audio -m -v *
</syntaxhighlight>
If your mp3 player does not support RVA2 you can use the following statement. The following command will adjust the volume by de-coding the mp3 to WAV using the RVA volume adjustment and then it is re-encoded to 128 bit mp3 (change this if you like).
Note:
* you need 'lame' and 'mpg123' codecs
* depending on the size can take a lot of drive-space and time
* your mp3 files will have the same bitrate
* you will loose some quality in the process - using a higher bitrate you still will loose some quality AND disk space as well.
<syntaxhighlight lang=bash>
sudo apt-get install mpg123
normalize-mp3 -m -v --bitrate 128 --mp3encode="lame -h -quiet --preset %b %w %m" *
</syntaxhighlight>
</syntaxhighlight>

Latest revision as of 06:06, 17 October 2019


RVA

With the following command volume information is stored in every selected mp3 so that a player with support for RVA (Relative Volume Adjustment) can play the mp3 at a normalized level. The encoded audio itself is not altered. With option '-m' an average volume level is calculated over the collection of files first to use as the targeted relative average volume.

Note: your mp3 player needs to support RVA. 

sudo apt-get install normalize-audio
normalize-audio -m -v *

If your mp3 player does not support RVA you can use the following statement. The following command will adjust the volume by de-coding the mp3 to WAV using the RVA volume adjustment and then it is re-encoded to 128 bit mp3 (change this if you like).

Note:

  • you need 'lame' and 'mpg123' codecs
  • depending on the size can take a lot of drive-space and time
  • your mp3 files will have the same bitrate
  • you will loose some quality in the process - using a higher bitrate you still will loose some quality AND disk space as well.
sudo apt-get install mpg123
normalize-mp3 -m -v --bitrate 128 --mp3encode="lame -h -quiet --preset %b %w %m" *

ReplayGain

ReplayGain is a different standard for almost the same thing. One difference is that it can't calculate an average over a collection of mp3's, it tunes all music to an 'universal volume level'. To enable ReplayGain in Rhythmbox musicplayer: in the menu go to Edit, Plugins and check 'ReplayGain' you can also set preferences.

Note 20130628: this setting seems to have no effect in Rhythmbox.

Install: 

sudo apt-get install mp3gain
mp3gain *

Analyze and set the ReplayGain information in the APEv2 tag: 

mp3gain -p *

Show tags: 

mp3gain -s c *

Here are some options to analyze and apply the calculated gain to the audio stream. Your audio player then does not need to support ReplayGain:

-r apply gain to audio stream
-k if needed, lower the volume to prevent clipping of audio
-p preserve file timestamp 

mp3gain -r -k -p *
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