How to switch to HDMI out sound default output for Jetson orin

Playing audio on a board requires selecting the sound output in the settings interface every time you restart. The default output is analog output, which is very troublesome. I have tried to modify the file in/etc/pulse/, but it did not work. How can I modify it so that HDMI output is the default sound output after each reboot.

please try this.

pacmd list-sinks for name or index number of possible sinks
pacmd list-sources for name or index number of possible sources
pacmd set-default-sink "SINKNAME" | index to set the default output sink
pacmd set-default-source "SOURCENAME" | index to set the default input

vim /etc/pulse/
set-default-sink <*output device name>

It’s working properly now

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