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Subject:Normalizing
Posted by: papareis
Date:10/5/2008 8:10:34 AM

I have several files that I'd like to be the same loudness. The normalization function seems to be the way to do this. After the normalize window is open, is it best to normalize based on the RMS or peak of the recording?

Subject:RE: Normalizing
Reply by: musicvid10
Date:10/5/2008 8:21:14 AM

**I have several files that I'd like to be the same loudness.**

Then you will want to use average (RMS) normalization, because the peaks in different files will be at different levels relative to the program material, so normalizing the peaks won't give you the results you want.

I use -18dB RMS normalization for music, and up to -12dB RMS for speech / dialog, with the compression option left on. Normalization using this method is a very useful tool.

Message last edited on10/5/2008 9:34:57 AM bymusicvid10.
Subject:RE: Normalizing
Reply by: papareis
Date:10/5/2008 3:01:01 PM

Thanks. So, if you look at the Normalization window, you set the left hand slider to ~ -12 db (I'm doing voice recording) ....' Any idea what the right-hand slider under the "scan settings" heading would be set at? I tried "select all" and normalize at -12 db and some other levels, but there wasn't really a change in the height of the tracing in the active window.

Subject:RE: Normalizing
Reply by: musicvid10
Date:10/5/2008 3:34:42 PM

Use the "scan levels" button to give you an idea what to include.
If you want to post a link to a clip a couple of us will take a look at it.

Subject:Normalizing
Reply by: papareis
Date:10/5/2008 7:29:25 PM

Thanks. I posted a clip at:

http://www.snapdrive.net/qs/5a07adccd9a9

I can normalize it based on the "Peak Level" but if I select the RMS normalization option, there appears to be no change if I try to normalize it to -10 to -12 db. Maybe I'm not selecting some other parameter correctly?

Subject:RE: Normalizing
Reply by: musicvid10
Date:10/5/2008 7:57:59 PM

That file is already clipped. Notice the flat-top on the upper half of the waveform (lower half is not clipped due to DC offset). Not much you can do except try the NR plugin to restore peaks if it is on your Sound Forge installation, and normalize this clip downwards (in a negative direction) to match other (quieter) clips without the volume overload. Hope this helps.

Feel free to post another quieter clip without clipping that you wish to match to, I will try to help . . .

Message last edited on10/5/2008 8:01:50 PM bymusicvid10.
Subject:RE: Normalizing
Reply by: papareis
Date:10/6/2008 2:19:33 PM

How about this one:

http://www.snapdrive.net/qs/2e2b202fb9c7

It's one of the examples that comes with Sound Forge to practice features on.

Subject:RE: Normalizing
Reply by: papareis
Date:10/7/2008 4:52:20 AM

Well, I hadn't looked but I discovered that the "Preset" field at the top of the page has dropdown options for voice and music already available. I thought you had to develop your own presets and, since I hadn't gotten that far, I didn't even look at the dropdowns.

So, I guess I can use the -10db preset for voice since it seems to work as I'd expect ... though I'm still not sure why I'm unable to effect any changes in the active window tracings by manually selecting other EMS levels in the two sliders.

Thanks for your help on this.

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