2009/11/17 Tom Watson <sdc695@xxxxxxxxx>
> I just did an fresh install of a Fedora 11, and it went well for the most
> part. Then I tried some audio stuff, and it seems that pulseaudio (groan!)
> has a closing delay.
>
> In my case I want to issue a "beep" then make a recording. This involves
> the equivalent of:
>
> $ aplay beep.wav
> $ arecord -d recordit.wav
>
> This used to work in a kernel of a few years ago, but in F11 there is a
> NOTICABLE delay from the end of the beep to the start of the recording. It
> can even be seen if one does a simple aplay and waits for the shell prompt.
> I was wondering if there was an option in a configuration file, or a hammer
> I can take to pulseaudio to solve this problem.
>
> An added bit of information: The beep.wav file is about 0.1 second long
> (if that matters, which I believe it shouldn't).
>
> Any clues would be appreciated,
> Thanks.
>
>
> --
> Tom Watson
>
>
In theory, minimum period bytes is 128 bytes if your alsa application are
using alsa-pulse plugin
err =
snd_pcm_ioplug_set_param_minmax(io,
SND_PCM_IOPLUG_HW_BUFFER_BYTES,
1, 4 * 1024 * 1024);
if (err < 0)
return err;
err =
snd_pcm_ioplug_set_param_minmax(io,
SND_PCM_IOPLUG_HW_PERIOD_BYTES,
128, 2 * 1024 * 1024);
if (err < 0)
return err;
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