Hello,
As per discussion, I know that ALSA driver does not have support for simultaneous playback and recording.
We are using AD1981B codec, so our hardware has a support for simultaneous playback and recording of an audio.
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?
Thanks & Regards,Prashant C.
--- On Wed, 19/8/09, Takashi Iwai <tiwai@xxxxxxx> wrote:
From: Takashi Iwai <tiwai@xxxxxxx>Subject: Re: unable to do simultaneous playback and recordingTo: "prashant chopade" <prashantchopade@xxxxxxxxx>Cc: alsa-devel@xxxxxxxxxxxxxxxxxxxx: Wednesday, 19 August, 2009, 5:50 PM
At Tue, 18 Aug 2009 05:05:10 -0700 (PDT),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.
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