I just opened some old MP3 tracks i did in Audition and noticed that apparently they are clipping. I am 100% sure they weren't clipping when i encoded them (they were about -3dbfs originally and before encoding i used to normalize to 0dbfs).
No biggie as they suck anyway but i was wondering whether this clipping is appearing only when being decoded to wave or if they also clip while playing eg in Winamp.
To what level do you normalize your wave files if you want to get proper MP3s?
0dbfs normalized MP3 files clipping when converted to wave?
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- KVRAF
- 5703 posts since 6 Dec, 2003 from Mission Control
http://mp3gain.sourceforge.net/
Lossless and undo-able. Set the "Target Normal Volume" to 92.0 dB and let it go.
Peace
Lossless and undo-able. Set the "Target Normal Volume" to 92.0 dB and let it go.
Peace
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- KVRAF
- 2582 posts since 24 Apr, 2003 from Canada
encoding to mp3 will often induce clipping, even if the source wav doesn't clip at all. Open some other random mp3s you have, and I guarantee 2/3rds of them have some clipping.
You should normalize your wave files to whatever you'd normally use (-0.3 or -0.1 is sometimes recommended to maintain compatibility with old cd players). Then after you encode to mp3, run the mp3gain program tomg suggests. This is the only surefire way to ensure the mp3s don't clip
otoh, this clipping is often not audible...
You should normalize your wave files to whatever you'd normally use (-0.3 or -0.1 is sometimes recommended to maintain compatibility with old cd players). Then after you encode to mp3, run the mp3gain program tomg suggests. This is the only surefire way to ensure the mp3s don't clip
otoh, this clipping is often not audible...
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- KVRist
- Topic Starter
- 366 posts since 1 Sep, 2004
So clipping!=clipping? I'm confused...
Shouldn't there be max level for wave files though so that no matter what you won't get MP3s that clip when being decoded back to wave again?
Anyway, thanks for the help guys!
Shouldn't there be max level for wave files though so that no matter what you won't get MP3s that clip when being decoded back to wave again?
Anyway, thanks for the help guys!
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- KVRAF
- 2582 posts since 24 Apr, 2003 from Canada
It just doesn't work that way. Every mp3 is compressed differently, so some will have more clipping than others. When you decode back to wav, this clipping will be in the exact same places as the mp3. The only way to get rid of this is to run mp3gain on the mp3 before decoding to wav.
Yes, clipping in mp3 is different than clipping in wav files. Complicated, I know
Yes, clipping in mp3 is different than clipping in wav files. Complicated, I know