I'm using a USB audio device with Raspberry pi 4 for audio input/output test.
When I play an audio file in webapp to use the audio element as below, there is no sound on RPi4.
<audio src="file_example_WAV_5MG.wav" controls> Your browser does not support the audio tag</audio>
However when I do audio test to use pacat on RPi4 with usb sound card,
my sound(earphone) and microphone are working well.
So, I'd like to know how to set audio setting in webapp for playing music.