Re: [alsa-devel] unable to do simultaneous playback and recording

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.

Takashi