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Hard Limiting

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ron123
Hard Limiting
on Nov 5, 2005 at 11:55:41 pm

In course with the last post,why does hard limiting fatten things up.I thought it was to do just what it's name suggests,keep things from going past 0db.Can anyone explain? ron



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willie toth
Re: Hard Limiting
on Nov 6, 2005 at 12:43:28 pm

Ron,

Yes, hard limiting limits the peaks but it will also bring up stuff buried in the track ... Here is the explanation out of the help file ... One thing to remember if you hard limit too much it will decrease dynamic range ....... WILLIE

The Hard Limiting effect drastically attenuates audio that rises above a defined threshold, leaving audio below the threshold unaffected. This effect is particularly useful for increasing perceived volume because you can amplify audio beyond the digital maximum, 0 dbFS, and you can lower areas that would otherwise be clipped. For example, when you convert from 32-bit to 16-bit audio, particularly loud 32-bit passages can cause 16-bit clipping. To prevent clipping, you can either use the Normalize effect to reduce the amplitude of the entire file (lowering perceived volume), or you can use the Hard Limiting effect to reduce amplitude only for loud passages (increasing perceived volume).



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ron123
Re: Hard Limiting
on Nov 6, 2005 at 5:29:43 pm

So Willie,it's basically the same as compressing?



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willie toth
Re: Hard Limiting
on Nov 6, 2005 at 6:24:39 pm

Ron,

Basically it is, but it fattens things up a bit better ...... WILLIE


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ozpeter
Re: Hard Limiting
on Dec 16, 2005 at 3:14:48 am

It can easily be proved by test inversion that Audition's hard limiter does nothing to the audio apart from apply the amount of amplification you have specified in the "boost input by" field - except where any transients would exceed the limit you have set. These are momentarily reduced. So inverting the hard limited file against the original with only identical amplification applied will result in silence apart from little clicks and "spitches" where the hard limiter has cut in.

The overall level is higher, and because of the way the ear works it sounds more bassy and fat, just as it would if you simply turned up the volume at the amp. But there has actually been no change in the eq.


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James Taylor
Re: Hard Limiting
on Nov 7, 2005 at 3:57:32 am

There are some great podcasts on using audition at this site:

http://www.audio2u.com/buildingthepod.htm

I believe episode 013 talks about hard limiting and why you might want to use it.

-James


-James


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