lost sound

  • Hello,

    can somebody please give me advise what is wrong?

    I have bought this usb capture recording (splitter)

    https://www.aliexpress.com/item/400109344….27424c4d2powgS

    my setup is

    sound work

    laptop or NAS or Rasperry --hdmi out -- to --- hdmi in splitter (link above ) - hdmi out to TV

    - from spliter usb out to raspberry - GPI 18 to LED


    sound does not work

    set-top box from vodafone --hdmi out -- to --- hdmi in splitter - hdmi out to TV

    - from splitter usb out to raspberry - GPI 18 to LED

    I don't know if I need to buy different , better splitter or problem is different ?

    thank you

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