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Check DMIC 2ch/4ch

Verification of 2ch/4ch DMIC recording

Preconditions

  1. The system is powered on.
  2. A Linux-based system with with PCH DMIC connected, ex:"Realtek AIOC and transducer card"

Note

  • This is specifically to test recording with PCH-connected DMIC

Test Description

  • Verification of 2ch/4ch DMIC recording
  • Recording should happen without any issue
  • Playback should be smooth without any glitches or noise.

Recording via 2ch/4ch DMIC

  1. Verify dmic device list. 
     arecord -l
  2. Capture audio using dmic device: 
    arecord -Dhw:0,0 -c 2 -r 48000 -f S24_LE -d 20 test.wav -vvv for 2Ch
arecord -Dhw:0,6 -c 4 -r 48000 -f S32_LE -d 15 test3.wav -vvv for 4ch
  3. Play and verify the audio file recorded in step 3: 
    aplay -Dhw:0,0 -c 2 -r 48000 -f S24_LE test.wav -vvv
    Note : 4ch dmic recording copy in IT laptop and play & verify
  4. Check the dmesg log: 
    dmesg | grep -E "snd|sof|soc" | grep -i error

Expected Results

  1. DMIC devices should list
  2. Audio capture should happen without any issues
  3. Playback should be smooth without any glitch
  4. No audio errors or failures should be present in the dmesg log.