Re: Noise Reduction
Re: Noise Reduction
- Subject: Re: Noise Reduction
- From: Kevin Dixon <email@hidden>
- Date: Tue, 11 Sep 2012 16:28:12 -0700
Actually a Noise Gate is a much simpler algorithm, in which signal
with less than a specified threshold is driven to silence. In this
case, it will not affect the signal greater than the threshold, so
there will be no noise reduction when signal is present.
The "noise profiling" features in Audacity and the like use some sort
of frequency-domain transform to try to remove the sampled noise from
the entire track. You may want to look at the Audacity source (open
source!) to see how this is implemented
-Kevin
On Tue, Sep 11, 2012 at 10:35 AM, Seth Willits <email@hidden> wrote:
>
>
> I have a need to apply some filtering to an audio track to cut out the background hiss/noise. I believe what I'm after is a Noise Gate. In Audacity and Amadeus Pro there is a feature to do this, where you select a region which has just the background noise, it profiles it, and then you can apply the filter to the entire track. I figured something like this would be commonly available from somebody as an Audio Unit (if not Apple themselves), but I haven't found one.
>
> Anybody know of a go-to solution for this?
>
>
> --
> Seth Willits
>
>
>
>
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