[pulseaudio-discuss] Crackling audio with Pulseaudio 4.0 and the simple Pulse API.

[Luke Yelavich]

On Thu, Jul 11, 2013 at 09:13:05AM EST, Peter Meerwald wrote:
> Hello,
> 
> > > This commit seems to break speech-dispatcher:
> > > http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/?id=30ce3a14e5ae1cd316a18bec95b831c07ac57a1a
> 
> this is not good
> 
> > buffer handling. Converting o_ss.channels to work_channels isn't enough
> > to fix the issue with speech-dispatcher, however, because there's also
> > another thing issue: when resampling happens before remapping, the
> > leftover buffer handling is completely broken, because it assumes that
> > the leftover data from the resampling phase is supposed to be stored in
> > the remap buffer, while it actually should be stored in the
> > to_work_format buffer. At least the ffmpeg resampler needs the leftover
> > handling with the speech-dispatcher stream. I don't have a simple fix
> > for this, so I'll just revert the patch for now.
> 
> the ffmpeg and libsamplerate code use the leftover logic; I assume 
> speech-dispatcher selects ffmpeg or libsamplerate instead of the default
> speex? or is the bug due to the issue in the peaks resampler?

Speech-dispatcher does not change the resampler algorithm used.

Luke