I have converted several audio books that were on cassette to mp3 files using "Cakewalk Pyro" to save the wav files then using lame to encode the files to 128/S mp3s.
Many of the files have volume irregularities: one channel is very soft and the other very loud. I would like to normalize the volume of both the channels so that they are they same.
I have tried "Mp3 Gain" but it does not fix the volume difference between the two channels. I would like to know if there is a program that will normalize BOTH the channels.
Full Version: MP3 volume question.
unless you used Stereo instead of Joint Stereo, I think you cannot do this...
If you used Stereo, I think you can use Mp3gain with the /l 1 and /l 0 switches.
If you used Stereo, I think you can use Mp3gain with the /l 1 and /l 0 switches.
QUOTE (/\/ephaestous @ Aug 15 2003, 07:11 PM)
unless you used Stereo instead of Joint Stereo, I think you cannot do this...
If you used Stereo, I think you can use Mp3gain with the /l 1 and /l 0 switches.
If you used Stereo, I think you can use Mp3gain with the /l 1 and /l 0 switches.
I used stereo. How do you pass switches to "Mp3 Gain"? I see a "Constant Gain" option, but that would entail normalizing each file manually.
I should mention that I am using the windows GUI version of "Mp3 Gain".
QUOTE (bid @ Aug 15 2003, 10:20 PM)
QUOTE (/\/ephaestous @ Aug 15 2003, 07:11 PM)
unless you used Stereo instead of Joint Stereo, I think you cannot do this...
If you used Stereo, I think you can use Mp3gain with the /l 1 and /l 0 switches.
If you used Stereo, I think you can use Mp3gain with the /l 1 and /l 0 switches.
I used stereo. How do you pass switches to "Mp3 Gain"? I see a "Constant Gain" option, but that would entail normalizing each file manually.
I should mention that I am using the windows GUI version of "Mp3 Gain".
I think you can't with the GUI version
Anyway, what I suggested, now i think it over, won't work, because mp3gain will calculate the gain of both channels and apply it to one only.
I think your best shot is to ask Snelg, to please help you out and make a modded version of MP3gain that scans each channel independently.
do you still have the wav files? You could simply use a wav editor to convert them to mono, then re-encode. I would think with audiobooks that preserving the stereo information wouldn't be that important.
No, I don't have the wav files 
Thanks for replying though.
Thanks for replying though.
QUOTE (/\/ephaestous @ Aug 15 2003, 08:00 PM)
QUOTE (bid @ Aug 15 2003, 10:20 PM)
QUOTE (/\/ephaestous @ Aug 15 2003, 07:11 PM)
unless you used Stereo instead of Joint Stereo, I think you cannot do this...
If you used Stereo, I think you can use Mp3gain with the /l 1 and /l 0 switches.
If you used Stereo, I think you can use Mp3gain with the /l 1 and /l 0 switches.
I used stereo. How do you pass switches to "Mp3 Gain"? I see a "Constant Gain" option, but that would entail normalizing each file manually.
I should mention that I am using the windows GUI version of "Mp3 Gain".
I think you can't with the GUI version
Anyway, what I suggested, now i think it over, won't work, because mp3gain will calculate the gain of both channels and apply it to one only.
I think your best shot is to ask Snelg, to please help you out and make a modded version of MP3gain that scans each channel independently.
Thanks for your input.
This problem is known as DC offset.
One way to correct it is by using wavTrim (http://www.logiccell.com/~mp3trim/). Unfortunately wavTrim needs to work with the .wav file...I don't think mp3Trim does DC offset correction.
Since you don't have the original .wav files or if you don't want to rip the cassettes again you could decode your mp3s to wav files, run wavTrim on them, and <gasp> re-encode them. Although I wouldn't do it on high-quality audio, considering the source (cassette/audiobook) I don't think there will be any significant problems re-encoding them.
If you want to rip the cassettes again, your Cakewalk program probably also does DC offset correction.
One way to correct it is by using wavTrim (http://www.logiccell.com/~mp3trim/). Unfortunately wavTrim needs to work with the .wav file...I don't think mp3Trim does DC offset correction.
Since you don't have the original .wav files or if you don't want to rip the cassettes again you could decode your mp3s to wav files, run wavTrim on them, and <gasp> re-encode them. Although I wouldn't do it on high-quality audio, considering the source (cassette/audiobook) I don't think there will be any significant problems re-encoding them.
If you want to rip the cassettes again, your Cakewalk program probably also does DC offset correction.
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