Quick update for those who use Odroid C2.
I am able to play all rates that my iDSD Micro BL supports: PCM768 and DSD512.
The trick was to install ARMBIAN Ubuntu 16.04.1 LTS 3.14.79-odroidc2 and add armhf architecture.
From time to time I need to reboot the unit as NAA fails with Failed to set scheduling parameters: (1) Operation not permitted and no number of networkaudiod restarts would help.
Other than that, it works fine and I’m quite happy.