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Subject:Boost6ing a bad audio track
Posted by: allenz
Date:11/26/2004 3:01:53 PM

Hi
I got a tape from a friend of a wedding ceremony that was videoed with a cheap Hi-8 camera. The audio track is really bad. Can hardly hear the audio and it was in mono. Plus there's a static noise throughout the audio.

I've got the noise removal program as soon as I can figure our how to get it into Sound Forge 7. Can't remember as I had to re-install everything.

Using Vegas, I duplicated the track and panned one track right and the other left to simulate stereo. I can get it into Sound Forge, but not being very experienced, how can I boost the audio so we can hear it?

Thanks
Allen

Subject:RE: Boost6ing a bad audio track
Reply by: Doug_Marshall
Date:11/26/2004 3:51:42 PM

If all you want to do is raise the volume of the file (at least as a first step), select Normalize from the Process menu in Sound Forge. This function will raise the volume of the entire file (or a selection in the file) so that it's loudest point hits a target you select (the "Normalize to" value). You can normalize to zero dB, but I would suggest giving yourself a few dB of headroom if you are going to do other processing as some functions (such as EQ, for example) may change the volume of the file slightly during their operation.

Your noise reduction plug-in should appear in the DX Favorites under Sony or Sonic Foundry.

Subject:RE: Boosting a bad audio track
Reply by: allenz
Date:11/27/2004 4:47:44 AM

Thanks Doug

Appreciate the help.
Allen

Subject:RE: Boost6ing a bad audio track
Reply by: mpd
Date:11/29/2004 7:24:30 AM

There are a could of things to keep in mind when normalizing.

You already mentioned that other processing can effect the volume. EQ can raise or lower the volume (average level). A boost will raise the level a bit, while a cut will lower it. Keep in mind, though, that both boosts and cuts can raise the peak levels (instantaneous level).

Also keep in mind that any normal volume adjustments will also effect the noise. So, if you raise the volume, you also increase the noise (the signal to noise ratio stays the same).

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