@ag123, @c0rnelius, and anyone else that has interest in sound on these devices.   I have been able to put together a patch that enables audio for H161/H618 devices.  So far only audio on HDMI works. Analog audio is still generating an error on startup.   The patches were taken from a git repository by warpme: https://github.com/warpme/minimyth2/tree/master/script/kernel/linux-6.6/files , and probably came from the Zunlong SDK. A lot of the code was written by Allwi