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

Jean-Marc Valin jean-marc.valin at usherbrooke.ca
Fri Jun 4 04:37:25 PDT 2010

On 10-06-04 05:16 AM, Gurinder Singh wrote:
> I have been developing an audio application using Speex. To reduce the
> background noise in the captured audio I have enabled the denoise
> feature and set the noise suppression level to 60.

There you go, don't do that. There's a reason that's not the default. If 
increasing that level didn't cause artefacts, I would have set it higher 
by default.


> Although the
> constant background noise is reduced but using denoise introduces a
> weird effect in the audio which can be described as 'Drain Pipe'
> effect.
> Has anyone faced a simiar issue with the denoise. If yes how did u
> manage to solve it or reduce this effect.
> Thanks,
> Gurinder
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