[pulseaudio-discuss] Cracks in the beginning of playback

[Arun Raghavan]

On Fri, 27 May 2016, at 12:15 PM, Hannu Lounento wrote:
> Hi,
> 
> I have a problem that sound played by a custom application using the ALSA
> API is
> cracked for the first ca. 10 seconds.
> 
> I've reproduced the same problem with aplay: I'm playing a short (~19
> seconds)
> wav file and the first ~7 seconds of the playback is cracked / has gaps
> but
> after that audio is played back properly, i.e. there are no noticeable
> cracks in
> the playback.

Have you tried setting tsched=0 in module arguments (to either
module-udev-detect or module-alsa-card, whichever your system is using
to load the card). This could just be that your card doesn't provide
pointer reporting with sufficient granularity to do timer-based
scheduling.

-- Arun