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Suggestion on Normalizing short samples - Maximum RMS Power

 
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chsharp



Joined: 10 Sep 2008
Posts: 2

PostPosted: Wed Sep 10, 2008 1:46 pm    Post subject: Suggestion on Normalizing short samples - Maximum RMS Power Reply with quote

Amadeus Pro 1.3.3 beta 1
OSX 10.5.4
MacBook Pro
-----------

If I use Maximal RMS Power for normalizing a very short sample (around 100 ms) the resulting sound is wildly distorted.

This makes sense since RMS is calculated over about 100 msec.

A suggestion is to throw an error if someone tries to do this. If someone tries to do some batch processing on a file (or files) and makes a mistake it could ruin the files.

I assume this is low priority since most people probably would not use Normalize on samples this short.

FWIW, I was reducing the volume of some handclaps in a song when I found this.
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CDJonah_alt



Joined: 15 Mar 2007
Posts: 378

PostPosted: Wed Sep 10, 2008 2:10 pm    Post subject: Suggestion on Normalizing short samples - Maximum RMS Power Reply with quote

Basically, I don't use maximal RMS power for normalization. You could
try changing the interval, I don't know whether it would help. What I
have done in situations like this is select the region and use amplify
with a fade in and fade out. Normally I do this over a longer interval,
generally the applause at the end of a concert, where I will take the
applause down a factor of 5. (these are classical concerts so normally
the dynamic range is very large.) I don't know why it wouldn't work for
shorter intervals.

Unfortunately, there are many ways to use AP to create bad results, so I
doubt it is worth the effort to try to figure them all out and put error
messages in.

Chuck

chsharp wrote:
Quote:
Amadeus Pro 1.3.3 beta 1
OSX 10.5.4
MacBook Pro
-----------

If I use Maximal RMS Power for normalizing a very short sample (around 100 ms) the resulting sound is wildly distorted.

This makes sense since RMS is calculated over about 100 msec.

A suggestion is to throw an error if someone tries to do this. If someone tries to do some batch processing on a file (or files) and makes a mistake it could ruin the files.

I assume this is low priority since most people probably would not use Normalize on samples this short.

FWIW, I was reducing the volume of some handclaps in a song when I found this.




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