After some more help and this time from jernej . Thank you.
I have now a script to fix the audio problem for any LE11/12 without extra binary. The same script works on LE11 or 12.
wget https://raw.githubusercontent.com/sky42src/LibreELEC.tv/11.80.5-240204/projects/Generic/filesystem/usr/bin/intel-gpu-max-10-bit.sh && chmod +x intel-gpu-max-10-bit.sh && ./intel-gpu-max-10-bit.sh
I opened a pull request to make the helper script part of official LE.
Generic: added intel-gpu-max-10-bit.sh helper by sky42src · Pull Request #8588 · LibreELEC/LibreELEC.tv
This uses modetest to set max 10 bit to solve…
github.com