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Audio

Output​

Users can output audio through the headphone jack and HDMI port.

Interface Switching​

Switch between the headphone and HDMI interfaces in the system settings, selecting one for output.

命令行模式​

In the terminal, execute the command: cat /proc/asound/cards:

  • HDA represents the HDMI sound card
  • APE represents the headphone sound card

HDMI​

aplay -D hw:HDA,3 hdmi.wav

Headphones​

aplay -D hw:APE,0 test.wav

Input​

Using the APE sound card, connect the headphones to start recording, execute the command line:

arecord -D hw:APE,0 -c 2 -r 16000  -f S32_LE test.wav