Normalization exceeds specified limit?

[Barak]

When using adaptive normalization to 85% with a 3000ms window, there are occasional spikes that go to 100%. How do I make this not happen?

[Spoon]

This ties in with your other post, I am quite sure that the file was already at 100%, I don't think the adaptive has increased the volume.

[Barak]

Spoon,

Here's the original sound file:



Here's the same file, with Adaptive Normalization @ 80%, 3000ms window, and a max normalization of 20x:



As you can see, while the vast majority of the file is kept within 80%, there are occasional deviations which can go to 100%. How do I stop this from happening? I would expect that 80% normalization means "no audio will exceed 80%", but that is not what is happening here.

[Spoon]

Ah I see what you mean, for the moment you will have to run a Volume Quieten and set it to 80%.

[Barak]

Spoon,

OK, if I use 80% with the "Clip any values over maximum" checked, that would work. The problem is that I'm using quieten already to make sure all my files are at 80% or below so the normalization happens (as per your instructions from the other thread). dbpowerAmp only seems to allow me to use each effect once. Why is that? I'd like to:

Quieten to 80%
Adaptive Normalize to 80%
Quieten (using clipping) to 81%

So I'll have to run each file through encoding twice to get the second Quieten?

BTW, in what order are the filters processed - top down?

[Spoon]

They are done in order top to bottom, so there is little point on doing the first quieten, just do:

Normalize
Quieten

[Barak]

Spoon,

But the point is to have the whole file be at 80%. If I do Adaptive normalize on a loud file which has not been Quieten-ed first, some sections will be above 80%, so when I do the Quieten after the normalization, the loudest, above 80% sections will be reduced to 80%, and the 80% portions will also be correspondingly reduced.

In order to make the whole file 80%, I need to:

1) Quieten the entire file to 80%.
2) Adaptive normaile so the whole file is at 80%
3) Use Quieten with clipping to hack off the 100% "jaggies"

There's no way for me to do this, since the DSP effects don't seem to allow more than one Quieten filter. Is there a way to do it?

BTW, is the "jaggies" thing a bug?

[Spoon]

It is a bug yes.

[Barak]

Spoon,

Sorry to drag this out - so is there a way to do Quieten, then Normalize, then Quieten?

-Ben

[Spoon]

No, I will make the fix as quick as I can, but there is a backlog of stuff straining to get out the door (codec updates etc)

[Barak]

Spoon,

Sorry to bug you - do you know roughly when this might be fixed?

-B

[Spoon]

Bumped to the top of my 'to do' should be next week

[Spoon]

How many bit is the file? I see it is mono 11KHz?

[Unregistered]

Spoon,

The files are 16 bit, 11Khz, Mono PCM .WAV files, but I seem to remember that the problem appeared with other sample rates.

-B

[Barak]

Spoon,

Is the fix done? If so, how can it be downloaded? Thanks!

-B