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Tuesday, September 30, 2008

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written by: Viktor Ustijanoski in
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Normalize mp3 volume with MP3Gain

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You have plenty of MP3’s on your mp3 player, in your car, home, computer etc.. And because there are recorded with different volume level you always reach volume knob when the new song is switched. But that’s over now, thank you MP3 Gain :)

MP3 Gain analyzes MP3 files to determine how loud they sound to the human ear. That means, it doesn’t do just peak normalization as many normalizers do, it does some statistical analysis to determine how loud the file actually sounds to the human ear. The program adjust MP3 files directly, without decoding and re-encoding. The result is MP3 files with same loudness without any quality loss.

MP3 Gain operates in two mode. Radio mode mode allows a mix of unrelated songs to be volume-corrected to a selected level. Album mode allows a selection of related songs (as they would appear on an album) to be volume-corrected relative to each other.

MP3Gain stores "Analysis" and "Undo" information in special tags inside the mp3 file itself. These tags are in the APEv2 format. APEv2 tags are carefully designed to not interfere with other tag formats, such as the popular ID3v1 format.

Unfortunately, some mp3 players do not strictly adhere to the ID3v1 standard when reading tags. As a result, when MP3Gain writes its APEv2 tags, these mp3 players might get confused and try to read the MP3Gain tags instead of the regular ID3v1 tags such as "Artist", "Title", etc. As a result, the player will show random garbage in these fields.

If you use MP3Gain and discover that your mp3 player has this problem, then here's what you need to do:

  • Select "Options - Tags - Ignore (do not read or write tags)" from the MP3Gain menu. This will prevent MP3Gain from writing any more tags to your files.
  • To remove tags that MP3Gain has already written, simply load the affected mp3s into MP3Gain and do "Options - Tags - Remove Tags from files"
Download here.

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News Pie said...

A very good program. When I took my mp3 player with portable speakers to a party, some of the songs were too loud and some too quiet. I used this to normalize them!