Lennart Poettering wrote: > On Mon, 27.04.09 01:08, Ludovico Cavedon (ludovico.cavedon at gmail.com) wrote: >> I am using pulseaudio 0.9.15 and alsa 1.0.19 on Ubuntu 9.04. >> >> I have noticed that when using ekiga or skype for voip calls I have more >> than 1 second delay in playback. More exactly: >> >> recording pulse, playback hw:0 --> very small RTT, below 1/4 sec >> recording hw:0, playback pulse --> very high delay, above 1 sec >> >> This happens both with: >> -HDA-Intel Conexant codec sound card >> -using a bluetooth headset >> >> How can I do to reduce it or help debugging it? > > PA configures the latency for its clients to what they ask for (in > certain limits). If an application doesn't get good latency than this > might be because it didn't ask for lower latencies. For an alsa application that would be the buffer_size? > If you pass tsched=0 to PA's ALSA modules this will disable dynamic > latency adjustments, to the effect that all apps will get the same > latency settings regardless what they ask for. Ok, I am already running with tsched=0 > Other than that, this might have a veriety of reasons. An output of > "ls" in "pacmd" might help to figure out what clients asked for and > what they actually got. Ah, thanks! Looks like ekiga is requesting a very bigger alsa buffer running on pulseaudio, than when running on hw:0, so I am trying to understand that. Thank you for your help, Ludovico
