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Lossy Audio Compression => MP3 => MP3 - General => Topic started by: 12345 on 2004-10-13 17:56:57

Title: MP3Gain & the Ignore option
Post by: 12345 on 2004-10-13 17:56:57
I want to use MP3Gain to change global gain field using the "Ignore (do not read or write tags)" option and save a .m3g file to be able to restore the "original" gain later. I might be a bad forum searcher, but most posts seem dicuss writing a APEv2 tag.
What is the correct procedure?

Procedure 1:
1 Run track or album analysis
2 Save analysis results to a .m3g
3 Run track or album gain

Procedure 2:
  (Run track or album analysis)
1 Run track or album gain
2 Save analysis results to a .m3g

These two procedures produce different results. Is any of them correct?
Later, how do I "recover" the original gain using the .m3g? Is it possible?
Title: MP3Gain & the Ignore option
Post by: 12345 on 2005-04-20 22:11:03
Old topic with no answer. I guess they call it bumping...
Title: MP3Gain & the Ignore option
Post by: timcupery on 2005-04-21 21:27:39
Old mp3gain program didn't save info to the mp3 files themselves, but could save info about the songs in .m3g files. I don't think .m3g files save the undo infomation, however.
Newer versions of mp3gain save the info (including undo info) to the file using Ape tags.
Honestly, I think that is the easier, better approach, provided that you're fine with having Ape tags on your mp3 files. They don't cause any problem, except that if you have id3 tags, foobar won't read id3 information if Ape tags are present because it prioritizes Ape tag info.

As far as I can see, there's not a way to save undo information in .m3g files. Of course, you can always save a text file (e.g., U2_gains.txt) in which you've written the amount of gain for each album that you've changed the volume using mp3gain. For example, I write:

2004 - How to Dismantle an Atomic Bomb
Lame 3.96.1 -V4, -9.0 dB

You just need to not lose the text file.
Title: MP3Gain & the Ignore option
Post by: Jojo on 2005-04-22 00:39:53
Quote
As far as I can see, there's not a way to save undo information in .m3g files. Of course, you can always save a text file (e.g., U2_gains.txt) in which you've written the amount of gain for each album that you've changed the volume using mp3gain. For example, I write:

2004 - How to Dismantle an Atomic Bomb
Lame 3.96.1 -V4, -9.0 dB

You just need to not lose the text file.
[a href="index.php?act=findpost&pid=292511"][{POST_SNAPBACK}][/a]

there's a easier way if you don't want mp3Gain to store the undo information within the file...just analyse your files. When you are done, save the results as *.m3g...keep that file. Now you can change the volume of all your tracks. If you want to undo the gain changes you just have to load the *.m3g file. If you've moved or renamed your song you need to open the m3g file with a text editor and modify the path / name ; or move the files to the location they were stored in first place...

Anyway, open another instance of mp3Gain and load your files. Now you can easily switch between the 2 windows and apply the volume changes how they used to be...
Title: MP3Gain & the Ignore option
Post by: 12345 on 2005-04-24 11:19:34
Quote
Quote
As far as I can see, there's not a way to save undo information in .m3g files. Of course, you can always save a text file (e.g., U2_gains.txt) in which you've written the amount of gain for each album that you've changed the volume using mp3gain. For example, I write:

2004 - How to Dismantle an Atomic Bomb
Lame 3.96.1 -V4, -9.0 dB

You just need to not lose the text file.
[a href="index.php?act=findpost&pid=292511"][{POST_SNAPBACK}][/a]

there's a easier way if you don't want mp3Gain to store the undo information within the file...just analyse your files. When you are done, save the results as *.m3g...keep that file. Now you can change the volume of all your tracks. If you want to undo the gain changes you just have to load the *.m3g file. If you've moved or renamed your song you need to open the m3g file with a text editor and modify the path / name ; or move the files to the location they were stored in first place...

Anyway, open another instance of mp3Gain and load your files. Now you can easily switch between the 2 windows and apply the volume changes how they used to be...
[a href="index.php?act=findpost&pid=292558"][{POST_SNAPBACK}][/a]


This seems like a good solution. The reason I don't want to use APEv2 is that I'm trying to switch from ID3v1 + APEv2 to a more compliant bare ID3v2.3 solution. I really doubt I will want to make gain changes later, but I want to know it's possible.

Thank you.
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