[alsa-devel] really no idea? Re: a11y: howto reduce latency with alsa's dmix plugin?

Halim Sahin halim.sahin at freenet.de
Sun Aug 30 18:13:38 CEST 2009

On So, Aug 23, 2009 at 09:55:18 +0000, Halim Sahin wrote:
> Hello,
> Is there a way to reduce latency on audiocard if the dmix plugin is in
> use?
> I am asking because there is a strange problem with asistive
> technologies which are outputing through alsa.
> E. G. speech-dispatcher takes almost a half sec to stop the
> speech-synthesizer.
> If the user navigates quickly through menus, there are simultane outputs
> at a time.
> (tested with an usb logitech headset, snd-intel8x0 based card,
> snd-hda-intel).
> The same problem can be reproduced by running mplayer with alsa output
> driver and pressing
> quickly left/right arrow.
> You should hear several samples at a time.
> Using an sblive card which doesn't use dmix doesn't have such problems.
> Using the dmix plugin should audio much faster to avoid this problem.
> Please help!!!
> Regards
> Halim

Halim Sahin
halim.sahin (at) t-online.de

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