Amit Nagal wrote: > i am using a OSS based usbaudio application for usb audio streaming . > > my usb audio device is capture only device . > > i want to set the fragment size of usbaudio alsa driver to reduce > latency problem coming in my application . > > currently even if my application reads 4k data from userspace , i > observed driver will buffer for 100 ms data ( period size data )= 16 k > at 44100 frquency > > and after driver reads 16k data , read call will return with 4k data > . so read() call remains blocked for 100ms which is causing some > latency problem . There is no extra buffer in the driver. There seems to be something wrong with your algorithm. Does recording with the arecord tool work? Regards, Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
