No 5.1 Sound over HDMI

Hello my configuration is:

Samsung UE40D6500

WD TV Live Streaming

Philips HTS5591 (5.1 Surround)

The Philips is connected to the HDMI ARC port on the TV, the WDTV is on another free hdmi port.

I tested several preferences I can’t get 5.1 sound over hdmi. If I press autodetect it says PCM 2 channel.

If I manually change it to 6 channels nothings happens, when I tick other options I hear no Sound.

If I play the file directly on my tv, 5.1 works.

In the Soundsettings of my TV at SPDIF-Output I could only choose PCM.

Your TV must support HDMI Audio Passthrough for 5.1 to work over HDMI.    It sounds like it does not…