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

Steve Underwood steveu at coppice.org
Fri Jun 4 21:17:08 PDT 2010

On 06/04/2010 07:37 PM, Jean-Marc Valin wrote:
> 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.
> 	Jean-Marc
>> 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
I've never heard a single mic denoiser that doesn't sound best in the 
"off" position. :-)


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