Ok i understand....
But i'm still surprise that Mr Balbes150 says there is sound in 5.8.x kernels, and you disagree for a couple of months in the futur.
If only i have "The Fix" ... I'll share with you off course, that's the deal and soul of GNU/linux users, ins't it ?
I'm surprise too, about HardKernel people, not sharing the sound HDMI drivers sources.. I understand it in this way, maybe i'm wrong !
( i suppose it's a driver issue to integrate with kernel, maybe it's working will installing it with an apt install command ? )
Thank you for efforts , times, replies, and informations.