Hi, You could try bitbanging any availiable peripheral(i.e gpio) from each system at the callbacks and have a logic analyzer measuring and reporting time delay. Best regards, Aris On Fri, May 18, 2018 at 3:37 PM, Muni Sekhar <munisekharrms@xxxxxxxxx> wrote: > [ Please keep me in CC as I'm not subscribed to the list] > > Hi All, > > I am trying to characterize the audio synchronization between two > systems. There is a mechanism to route audio between two systems, we > run ‘aplay’ at one system and ‘arecord’ in other system. > > We need to measure the time difference when audio sample is out at one > port and arriving at another port in different system. > > I plan to add printk’s in “struct snd_pcm_ops” call backs, but does > these call backs tells when it received first and last audio > frames\samples? > > Or else please suggest any other best method. > > > -- > Thanks, > Sekhar > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
