How to make sound via HDMI connection work

[D_el]

Hello! I`m very new on how SBC`s work, and wanna know if there`s some way to fix this situation:

 

My audio is not actually being reproduced via the HDMI connection between my TV and my Orange Pi [Orange Pi 4 LTS].

 

I took a brief look at the solutions/instructions on the documentation page ((https://docs.armbian.com/User-Guide_Fine-Tuning/#sound-output)), such as:

 

# Check the available sound output options:

pacmd list-sinks | less

# The default will be marked with "*"

# Press "q" to close

# Define the new default sound output

pacmd set-default-sink <NAME-OF-DESIRED-OPTION>

 

but i only got this, and as far as i could test, it serves no use to my ends:

 

1 sink(s) available.
  * index: 4
        name: <auto_null>
        driver: <module-null-sink.c>
        flags: DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
        state: RUNNING
        suspend cause: (none)
        priority: 1000
        volume: front-left: 65536 / 100% / 0.00 dB,   front-right: 65536 / 100% / 0.00 dB
                balance 0.00
        base volume: 65536 / 100% / 0.00 dB
        volume steps: 65537
        muted: no
        current latency: 1.92 ms
        max request: 0 KiB
        max rewind: 0 KiB
        monitor source: 4
        sample spec: s16le 2ch 44100Hz
        channel map: front-left,front-right
                     Stereo
        used by: 1
        linked by: 1
        configured latency: 2.51 ms; range is 0.50 .. 2000.00 ms
        module: 31
        properties:
                device.description = "Dummy Output"
                device.class = "abstract"
                device.icon_name = "audio-card"

 

any workaround, or proper solution to this issue?

 

Thanks in advance.

Edited December 23, 2022 by D_el
better disposition of the terminal text i put in the topic

[SoSie]

Have you tried pavucontrol?,

it's graphical and you will see if the app you are running gives something at input. You can redirect input to your hdmi, if hdmi is recognized as a output HDMI port.