Comment 99 for bug 345627
Revision history for this message
| Daniel T Chen (crimsun) wrote Re: [Bug 345627] Re: Crackling / scratching noise using Pulseaudio | #99 |
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35a32c5
(Get the code!)
On Wed, May 13, 2009 at 11:55 PM, Conn <email address hidden> wrote:
> As you can see, we're currently using the second-worst resampler. From
> personal testing, my conclusion was that speex-float-1 was the best
> resampler that balanced low CPU usage with audio quality (no distortion
> or crackles at certain ranges). For all the resamplers from speex-
> float-0 and below, crackles occured on both of my systems (using
> different codecs of snd-intel8x0).
There are HDA users who do not experience the symptoms using ffmpeg.
There are also HDA users who experience the symptoms using
speex-float-*.
There is a hardware component involved.
> I suggest if you have time (and find some appropriate audio samples),
> you test some of the resamplers to find the optimal default in
> PulseAudio.
There does not seem to be an optimal default given the extraordinary
range of craptastic hardware, AC'97 and HDA alike. What is immediately
reproducible on certain Dell and ASUS hardware is practically
impossible to reproduce on my HP and IBM.