[pulseaudio-discuss] Controlling alsa and pulseaudio buffer size?

[pierre-louis.bossart at linux.intel.com]

>> In my application, I'm using alsa to set a particular buffer size.  Alsa
>> usually complies, but from everything that I can tell, pulse audio is
>> using
>> some other fragment size.  This other fragment size also seems to be the
>> time betwen interrupts which my application sees.  This messes up my
>> application because it wants the interrupts at regular intervals based
>> on
>> the buffer size I set.
>>
>> Is there some way to make alsa and pulseaudio agree on the size?
>>
>
> It is possible to turn off the ALSA period wakes in tschedule mode on some
> hardware. This would allow pulseaudio to manage it.
>
> See this thread:
> http://lists.freedesktop.org/archives/pulseaudio-discuss/2011-January/008638.html

Have you played with the ADJUST_LATENCY flag? If it is not set, then the
total latency will not match the buffer size you configure.
-Pierre