On Fri, 20 Aug 2010, Harsha, Priya wrote: > Hi > > I had modified the arecord application to call snd_pcm_writei() with the > output of snd_pcm_readi(). Basically a loopback. > > When we execute, I see the calls return EPIPE (lot of overruns and a few > underruns). Can anyone help me understand why there are underrun/overrun > being printed? Is it because of the serial call of reads and writes? Is > there any issue with the driver I am using? Can you suggest some ways to > overcome these messages? You must queue playback with more samples at the beginning (to setup the output latency) otherwise you get the output underrun immediatelly. See alsa-lib/test/latency.c for an example. Jaroslav ----- Jaroslav Kysela <perex@xxxxxxxx> Linux Kernel Sound Maintainer ALSA Project, Red Hat, Inc. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
