Hello,
My understandings:
>Define your meaning of "simultaneous playback and recording" more>exactly.
I mean: Playing audio file stored on disk on speaker and at the same time recording audio from MIC and storing it on disk.
I don,t want to do multiplayback, I mean i don,t want to play two or more audio files at a time.
So you are saying that my driver(ATMEL-AT91SAM9263-AC97c) is not supporting the full duplex mode?
Thanks & Regards,
Prashant C.
>prashant chopade wrote:> > Hello,> > As per discussion, I know that ALSA driver does not have support for> simultaneous playback and recording.
Huh? The full-duplex is of course supported.Your example shown in the thread doesn't indicate the multi playbacksor so.
> We are using AD1981B codec, so our hardware has a support for> simultaneous playback and recording of an audio.
I think you are confused.
> So what exactly I have to do to get a support for simultaneous> playback and recording? > Shall I have to use sound server demons?> > Is it really possible to do simultaneous playback and recording in> linux?
Define your meaning of "simultaneous playback and recording" moreexactly.
If it's about full-duplex, the answer is definitely yes.If it's multi-streams, the answer is yes, but there are choices, e.g.dmix/dsnoop plugin or a sound server.
Takashi
> prashant chopade wrote:> > > > > > > > > > > > Hello,> > > > We using linux-2.6.27 on target board-AT91SAM9263EK.> > We are using ALSA library utilities (aplay &> > arecord). But by using these utilities we can’t do simultaneous playback and> > recording.> > > > > > > > We performed following activity to come to this conclusion:> > > > > > > > //At the background we were recording> > > > #arecord –f cd record_test_file &> > > > > > > > //At the forefront we were playing pre-recorded audio file> > > > #aplay –f cd pre_recorded_file> > > > > > > > Our observation is that, recording stops when start playing> > file.> > In the API side, the above should work fine. It must be the driver > that doesn't work with full-duplex.> > > Takashi
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