[pulseaudio-discuss] Switching resamplers

[Lu Guanqun]

Hi Arun,

I've once done a simple test about how different resampler method could
impact the CPU utilization. You can take a quick look. ;) (It's very
high level, and it didn't include speex-float-1, maybe I'll try to add
speex-float-1 and post the result again...)

Generally, I don't have objections as long as the sound quality doesn't
degrade too much, however, it might be subjective.

On Wed, Sep 28, 2011 at 05:20:51PM +0800, Arun Raghavan wrote:
> Hey folks,
> We've seen discussions a number of times on IRC about this, and now that
> 1.0's out the door, this might be a good time to consider this.
> 
> The current default resampler is speex-float-3, which is on lower-end on
> highly loaded systems can be problematic (cause an underrun flood,
> f.ex.). The current choice among distributions seems to be between
> speex-float-0 (~2.5-3x faster) and speex-float-1 (~2-2.5x faster). On
> embedded systems people might plug in something lighter still (like the
> ffmpeg resampler).
> 
> Qualitatively speaking, I can't really perceive the difference between
> speex-float-1 and speex-float-3. Might be a good idea to perform some
> blind trials, though.
> 
> So any objections to moving to speex-float-1 as the default?
> 
> -- Arun
> 
> _______________________________________________
> pulseaudio-discuss mailing list
> pulseaudio-discuss at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss

-- 
guanqun
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