Alan Stern wrote: > Can you explain briefly how the snd-usb-audio driver decides how many > URBs to submit and how many isochronous packets to use in each URB? The default is to have 8 ms per URB (which can be adjusted with the nrpacks module parameter) and to have enough URBs for a total queue length of 24 ms. These values are adjusted down if the application has configured the period size (which is the application-visible interrupt interval) to be smaller. > In practice, it seems that the pipeline depth is often lower than I > would expect. Then the application does use a small period size. You can check this in /proc/asound/card*/pcm0p/sub0/hw_params. Regards, Clemens -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
