[linux-audio-user] Re: Removing AC hum after the fact.

Mark Knecht markknecht at gmail.com
Mon May 29 13:25:59 EDT 2006


Hi,
   Not that you want to use it but Waves X-Hum does a really good job
at this. Go look carefully at their screen shot. Possibly you can
model some group of notch filters like they show and do a better job?

http://www.waves.com/content.asp?id=143

Good luck,
Mark

On 5/29/06, Alex Polite <notmyprivateemail at gmail.com> wrote:
> Thanks for all the input.
>
> I did some experimentation with jamin. Cutting of everything below 300
> Hz sure helped alot. But the  harmonics went right through the speech
> spectrum so canceling them all out pretty much meant canceling the
> speech out as well.
>
> I found freqtweak and hooked that up. It did  produce a very beautiful
> spectrogram but it didn't solve my problem.
>
> I need something smarter. Something that will  1) take a few seconds
> of audio when there's no speech (only hum) and treat that as a
> baseline. 2) Reduce the frequencies all over by that baseline.
>
> In effect analyzing the tool would look at the hum and create a filter
> that matches it exactly. I guess there's a word for that?
>
> alex
>
> --
> Alex Polite
> http://flosspick.org - finding the right open source
>


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