So you can not play HD audio streams on the HiMedia? 
Using Android 7 firmware 2.0.1 or Android 5.1 firmware 1.0.9:
With Kodi 16.1:
- All HD-Audio (e.g. 7.1 channel) from local sources (USB/SATA/Samba/NFS) using Kodi+wrapper.
- Up to 5.1 channel audio (DTS / AC3) from local sources (USB/SATA/Samba/NFS) using Kodi internal player.
- Up to 5.1 channel audio (DTS / AC3) from Kodi streaming add-ons using Kodi internal player.
With Kodi 17:
- All HD-Audio (e.g. 7.1 channel) from local sources (USB/SATA/Samba/NFS) using Kodi+wrapper.
- Only 2 channel audio from local sources (USB/SATA/Samba/NFS) using Kodi internal player.
- Only 2 channel audio from Kodi streaming add-ons using Kodi internal player.
The expectation is that the next Android 7 firmware will enable Kodi 17 7.1 HD-Audio passthrough using Kodi internal player, streaming and local.