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Old August 21st, 2003, 07:09 PM   #1
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Any way to restore precious windy audio?

I forgot to enable the windscreen for this one shot and while you can hear what people are saying, there's too much wind. I tried using Cool Edit's noise reduction but that doesn't really help.

Any suggestions?

Thanks
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Old August 22nd, 2003, 03:14 PM   #2
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Your dialog track is probably not restorable. You can try a low-pass fllter to take out some of the rumble but if you have very severe wind noise the only solution will probably be to either re-shoot the scene or dub a new dialog track under the footage.
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Old August 22nd, 2003, 07:18 PM   #3
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Hi Gerald,
I have had very good luck at reducing, but not totally eliminating, wind rumble.
Here's how. Use a graphic equalizer. Cut out all the base below 225Hz. Then give a slight boost in the 2kHz to 7kHz range
to increase voice intelligability.
I, too, have tried using noise reduction plug-ins that sample
the noise but without much success. You may acheive the best results by using the equalizer and then using just a touch of
noise reduction.
Let us know if this helps.
Dave
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Old August 22nd, 2003, 07:50 PM   #4
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Gerald,

Good suggestions. A slightly better tool to do the same job would be a high pass (reduces all frequencies below filter's center frequency) or a low shelf filter (reduces all frequencies below filter's center frequency by specified amount). If you
can chain two or more to provide a steeper filter slope, it's possible to remove even more of the low frequency components without cutting into the desirable band. Usually, one filter is a 2nd order (2 pole) section with a -12 dB/octave slope. Usually, about four sections (8th order or 8 poles) are needed for
jobs like this.

Gints
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Old August 22nd, 2003, 10:05 PM   #5
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There is a product on the market called SoundSoap which is supposed to help reduce audio noise while preserving dialog, etc. The manual cites wind noise as one example of rumble it can reduce. I just bought the software today and haven't used it yet, but it has a testimonial on its site from someone using FCP. Go to www.bias-inc.com for a look. P.S. For $99, if it works, it's a bargain.
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Old August 22nd, 2003, 10:56 PM   #6
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Patricia,
Indeed, I have Bias' SoundSoap and it's a pretty darn good product (and value). It operates as both a stand-alone product as well as a VST plug-in with Bias' Peak products. It can, and will, make some headway to cut wind noise. Basically, it "learns" where the noise is with your guidance. I tried it on some very windy vacation footage from my wife's ZR20 camera early this year. It did a good job of reducing the noise, to be sure. But it could not audibly eliminate it and it did attenuate voice portions of the track.

So if you have SoundSoap and want a somewhat simplified tool to accomplish much of Dave's and Gints' excellent recommendations it's certainly worth a whirl. It couldn't hoit!
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Old August 22nd, 2003, 11:57 PM   #7
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Hi Gerald,
Regarding Soundsoap. I think it would depend on whether or not there is dialog simultaneously to the wind. If so, I don't think
Soundsoap is worth getting. See, I've never tried this program
but I have one that works along the same lines and is considered
*better* than Soundsoap. The problem is: as you start cutting
out the wind what also happens is that the voices develop a
noticable robotic quality to them. On a scale of 1-10, so far as
effectiveness in doing what you're trying to do -- of course based
upon my own experience doing the same thing -- I would give
noise reduction a "2" and graphic equlization an "8". The equalization I described, alone, will take out about 80-90% of the wind with no speach artifacting.
Hope this helps.
Dave

P.S. For noise reduction, I use Waves Restoration Bundle.
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