Bill Unruh <unruh <at> physics.ubc.ca> writes: > > On Thu, 7 Jan 2010, Preston wrote: > > > For weeks now I have been struggling to make duplex audio work in my > > software. I have exhausted my web browser looking for answers. So I > > have decided to fall back and ask about the general idea. Is there a > > way to open capture and playback streams at the same time? > > Sure. Just run aplay and arecord at the same time, and you will get duplex. > > Ie, this demonstrates that a) it is possible, and b) not only is it possible > but it is possible for two independent programs to do this at the same time. > > Now if on your system this does not work then it may indicate that for your > card duplex does not work. > > > > > I have a dumb codec connected to an Atmel AT91SAM9260-ek board. > > Alsa version 1.0.19 and a custom driver for the codec (initializes > > as a card connected to SoC). Functionality works great when single > > stream is setup. However finding a way to setup both streams is > > killing me. I will eventually be passing the data captured from > > the card to a TCP socket. Then will collect data from socket and > > playback on card. effectively duplex audio over ethernet. > > > > So now I plead. Anybody have a method to open capture AND playback > > streams Simultaneously? > > > > > > ---------------------------------------------------------------------------- -- > > This SF.Net email is sponsored by the Verizon Developer Community > > Take advantage of Verizon's best-in-class app development support > > A streamlined, 14 day to market process makes app distribution fast and easy > > Join now and get one step closer to millions of Verizon customers > > http://p.sf.net/sfu/verizon-dev2dev > > _______________________________________________ > > Alsa-user mailing list > > Alsa-user <at> lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/alsa-user > > > Thanks for the reply, but I would like to take it a step further. I am able to get aplay and arecord to run at same time, but my problem lies in my software. Specifically function calls to opening a capture stream and a playback stream, i.e. (snd_pcm_open(...capture) and snd_pcm_open(...playback). Without it complaining about a busy device. I am really trying to avoid having to write two programs, one for opening playback and one for opening capture, but maybe thats what I will have to do. Hopefully my question makes sense, I've been starring at Alsa code for so long that I might just be crazy. ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
