Cracks after exporting to mp3

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m0_om
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Cracks after exporting to mp3

Post by m0_om » Thu May 27, 2010 11:59 pm

Hello,

Wav file with my record looks like -
audacity.png
audacity.png (5.98 KiB) Viewed 951 times
.
It looks like this because I have recorded speak of two people with different voices - first one is loud person, second is quiet one. When I play this record saved in wav file format, everything is OK, but when I export record to mp3 file format, I hear cracks...

I have tried to amplify and normalize record already, but exported mp3 file sounds exactly the same like this without these operations.

Could you advise me what should I do before I export my record to mp3 file...

Cheers

steve
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Re: Cracks after exporting to mp3

Post by steve » Fri May 28, 2010 1:55 am

That looks like you have recorded far too loud and it has distorted.
Distortion often sounds worse after you export from Audacity because of the way that normal audio files clip the waveform. The recorded waveform should not exceed the top/bottom of the Audacity track.
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m0_om
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Re: Cracks after exporting to mp3

Post by m0_om » Sat May 29, 2010 10:10 pm

Thank you for your answer!

Are there any ways to "save" this record and export it to mp3 file without cracks?

BTW: Skype has a feature which adjusts mic volume level automaticaly. Is something similar in Audacity?

Trebor
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Re: Cracks after exporting to mp3

Post by Trebor » Sun May 30, 2010 5:11 am

m0_om wrote:When I play this record saved in wav file format, everything is OK, but when I export record to mp3 file format, I hear cracks...

Are there any ways to "save" this record and export it to mp3 file without cracks?
"Amplify" with default settings should set the peak amplitude to 0db,
or "Amplify" and set "Peak amplitude" to "-0.1" to be on the safe side.

Apply "Amplify" to the wav before saving as mp3, then if the wav was crack-free so should the mp3 version.

m0_om
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Re: Cracks after exporting to mp3

Post by m0_om » Mon May 31, 2010 6:32 am

Trebor wrote:"Amplify" with default settings should set the peak amplitude to 0db,or "Amplify" and set "Peak amplitude" to "-0.1" to be on the safe side.Apply "Amplify" to the wav before saving as mp3, then if the wav was crack-free so should the mp3 version.
Thanks! Now it is ok:)!

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