Hi Clemens, Thanks for responding. On Dec 10, 2015, at 11:24 AM, Clemens Ladisch <clemens@xxxxxxxxxx<mailto:clemens@xxxxxxxxxx>> wrote: As you can see the time between these two logs is less than 1 millisecond, so I don’t understand how the PCM can go from 2080 frames available to >4096 frames available so quickly. This sounds like a bug. Which version of alsa-lib are you using? Do you have any suggestions for debugging or instrumentation I can add to alsa-lib that would help me track down what’s going on? Rob. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel