TX1 || Playback issue while recording simultaneously

Dear All,

We are working on a TX1 module with the external modules of microphone and speaker and we are using 24.2.1 OS.

We are recording with commands like arecord and aplay for recording and playback respectively.

While doing the below experiments we could able to observe an issue as below,

  1. With only recording and not playback we haven’t faced any issues.
  2. With only playback and not recording we haven’t faced any issues.
  3. By starting an infinite recording in the background and by doing a playback of the audio file(30seconds, the sampling rate of 22050, the channel is stereo), after some iterations, we are facing a below error and we could not able to listen to the audio.

Error: aplay: pcm_write:1940: write error: Input/output error

Below are the respective commands for recording and playback,

  1. arecord -D hw:0,0 -c 2 -f s16_le -r 8000 /home/ubuntu/mic_testing.wav &
  2. aplay -D hw:0,3 audio_22k_c2.wav

But when the issues come, we just stopped recording and restarted the recording in the background. After this, the playback is working fine.

Also, during the issue came, we have checked for the below properties,

  1. I2S has been enabled. Checked under the file: /sys/kernel/debug/clock/clock_tree
  2. Driver callbacks have been called. (Checked with the kernel logs[dmesg])

We would like to know the reason behind this error.?

On r24.2, there is an issue about noise in audio playback. Please try the patch:

Dear DaneLLL,

This is not regarding the noise on the playback.

Kindly look into the error which I have mentioned earlier.

Could you try r28/r32 releases? Since we have moved the development to later releases: