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