[pulseaudio-tickets] [Bug 49608] periodic audio skips with Intel HDA

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49608

--- Comment #11 from Raymond <superquad.vortex2 at gmail.com> ---
(In reply to rkfg from comment #9)
> LMMS uses 64 frames, 1.5 ms but actually it has latency of 30-35 ms as
> "pacmd list-sink-inputs" says. Setting its output to ALSA results in
> extremely garbled sound, the only two options that actually produce
> reasonable sound is PulseAudio (bad latency) and SDL. Actually, latency
> isn't that bad if only PA doesn't increase it internally for every client.
> 
> I've got a decent CPU here, G620 @ 2.6 GHz so I may understand skipping on
> high CPU load, BUT PulseAudio has very high realtime priority (15) and if I
> use pure ALSA there are no skips.

Refer to src/core/audio/AudioAlsa.cpp, it using 8 periods per buffer,

 how can lmms use 64 frames ?

minimum period bytes of snd-hda-intel and pulse plugin are  128 bytes (32
frames)

m_periodSize = mixer()->framesPerPeriod();
        m_bufferSize = m_periodSize * 8;

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