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