Thank you nerd for you comment. At least I understand what happen; RPi3B is not adapted to this task as AVC-X4800H can’t input stream from USB. It can only read a memory as said here.
I own an Odroid N2+ but as I use daily as media-player, I don’t want jeopardise it removing petitboot to install Volumio3.
Looks like there is no option. See my post here . Do you confirm?
In fact, my media-player runs CoreElec. It can’t natively play DSD streams, so I installed Squeezelite and LMS. Unfortunately I still can’t play DSD streams unlike some people who are successful. If you are interested see here.
I’m feeling rather hopeless.
Any idea is welcome. Thanks