Asustor Portal and audio over optical (SPDIF)

[shiboshu]

Hello community,

First, im sorry for my very bad english.

I got a problem with my NAS and the connection to my AVR over optical cable.
My NAS is connected to a benq w1070+ projector over a HDMI 1.4 cable, and the sound should go to my Yamaha AVR over a optical cable.
In Kodi 16 it works very well with activated passthrough, but in the Asustor Portal i can not change the sound output method.
What can i do, is there a Way?

Ty Alex

[rehlch]

is there a solution for this?
have the same problem.