Bug#886782: pulseaudio: Audio playback is slow (sample rate mismatch?)

[Felipe Sateler]

On Tue, Jan 9, 2018 at 5:44 PM, Andy Simpkins <rattusrattus at debian.org> wrote:
> Package: pulseaudio
> Version: 10.0-1+deb9u1
> Severity: important
>
> Dear Maintainer,
>
> Following the upgrade to stretch sound on my system has stopped
> working correctly.  Instead of normal sounding playback, all audio now
> plays back slower than it should.
>
> This feels like it could be a sample rate issue.  The only speakers on
> my system are on my monitors and derive their audio over display port.
> As part of the Squeeze upgrade I am aware that my Graphic Card drivers
> got changed from the 'non-free ATI drivers to the recommended FLOSS
> driver so it could be something there...

Could you try with the trivial resampler? That should rule out the
resampler as a source of the slowness.

The driver change sounds a lot more likely to be the cause. Could you
try booting with the jessie kernel to see if the slowness goes away?
Also relevant, is the slowness present when playing to any output, or
only on one (HDMI, internal, etc)?

Another avenue to try is to set default-fragment-size-msec to some
very high value, like 250ms.

-- 

Saludos,
Felipe Sateler