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Subject:Twittering sound using Noise Reduction Plugin
Posted by: dneiger
Date:7/31/1999 3:40:00 AM

I have recently purchased the noise reduction plugin
(upgraded to 1.0b) which I am using with Sound Forge 4.5b.

I am using it to remove background noise from tapes and old
records. So far so good except that when I play back the
processed sound I hear a high frequency twittering (not
unlike sparrows!).

My settings are
Reduce noise 35db
Attack speed 90
Release speed 50
No high shelf boost
FFT 1024
Overlap 67
Noiseprint fit 512

I reviewed the earlier version (non-direct-X) for PC
Authority Magazine and it worked that well that I purchased
the latest version. Unfortunately I am quite disappointed.

What is going wrong here??

David Neiger
Journalist
PC Authority Magazine

Subject:Re: Twittering sound using Noise Reduction Plugin
Reply by: Spot/DSE
Date:8/8/1999 11:27:00 PM

David, your settings as posted, may be a bit too high. I'm obviously
not aware of the audio content, however, if the noise has a wide span
of dynamic range, these settings would certainly get rid of the noise,
but leave behind artifacts that would match your description of sound.
If the content is fairly 'solo' or quiet in nature, then this would
definitely be the case, the same with content of a very high dynamic
range. If you'd like to contact me directly, I'd be happy to try to
work through whatever you are trying to accomplish. Some content
simply can't be completely cleaned, no way, no how. Not even with
CEDAR systems or other super high end systems. The N/R plug in is
about as good as anyone's system is. It certainly makes
ProTools/NoNoise plug in look silly. I've compared them side by side
for magazine reviews myself.
>>
>>My settings are
>>Reduce noise 35db
>>Attack speed 90
>>Release speed 50
>>No high shelf boost
>>FFT 1024
>>Overlap 67
>>Noiseprint fit 512
>>
>>I reviewed the earlier version (non-direct-X) for PC
>>Authority Magazine and it worked that well that I purchased
>>the latest version. Unfortunately I am quite disappointed.
>>
>>What is going wrong here??
>>
>>David Neiger
>>Journalist
>>PC Authority Magazine

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