At Sun, 23 Aug 2009 09:55:18 +0000 (UTC), 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. It's a bit hard to guess. This could be the difference of PCM drain implementation between hw and dmix, but a half second is still too long. Could you prepare a small test case to reproduce the buggy behavior? thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
