Re: [SLUG] MP3 gain

From: Eben King (eben01@verizon.net)
Date: Wed Sep 10 2008 - 11:52:39 EDT


On Wed, 10 Sep 2008, ronan wrote:

> Eben King wrote:
>> I've got an album whose tracks are in mp3 format. The gain for these tracks
>> was set per track, so the gain for track x is different than the gain for
>> track y. While this isn't particularly annoying, it is in this case because
>> several tracks merge continuously into the next and it is rather annoying
>> to have the loudness change abrubtly in the middle of a song.
>>
>> So, how can I renormalize these tracks as a set without re-encoding them? I
>> have "mp3gain", but I can't make it DTRT. Both "-a" and "-r" leave sudden
>> volume changes on some track transitions. Is it possible the original
>> encoding software modified the actual data? Would that affect mp3gain?
>>
> Could it be that the software that you are using to play-back the MP3s does
> not honor the MP3Gain flag that is in the MP3 files? The player software must
> contain code to find that tag, and honor it.

It's possible, but that means the differing playback volumes (and clipping
in some cases) are hardcoded into the data. Too see for sure, I could
export the mp3 -> wav using mpg321 (I think) then open the wav with snd (if
I have it), unless there's a simpler way...

-- 
-eben   QebWenE01R@vTerYizUonI.nOetP   http://royalty.mine.nu:81

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