[Speex-dev] Denoise causing drain pipe effect in audio

Jean-Marc Valin jean-marc.valin at usherbrooke.ca
Fri Jun 4 14:12:30 PDT 2010

On 10-06-04 08:31 AM, Henry Gomersall wrote:
> I hope people don't resent me making a point on this, as I don't
> actually know how the noise suppression in speex works, but I have some
> knowledge in the area of noise suppression.
> In general, if you have information about the nature of the noise you
> are trying to suppress, you can do much better than just assuming white
> noise.

Nobody assumes white noise. The Speex noise suppressor applies an 
MCRA-like algorithm to estimate the noise and then it has a spectral 
amplitude estimator (similar to Wiener, but with a better criterion than 


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