>1) Is it necessary to open the device twice, as opposed to opening >it once, passing SND_PCM_STREAM_PLAYBACK|SND_PCM_STREAM_CAPTURE instead?
yes it is. ALSA PCM streams are uni-directional, always. we've played with it the other way, and there were some problems. >2) Doesn't the link function do some sort of buffer >synchronization between the two handles (read and write) so that you have no. all the link function does is to ensure that stop/prepare/start operations on one handle propagate to the other. it does not do any kind of synchronization between the streams. >3) What behavior differences does one have if one doesn't link the two >handles and one opens the device twice, as mentioned above? you have to explicitly stop/prepare/start both streams. --p _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
