I recently added a Sonos Beam to my existing Sonos setup.
I moved two Sonos Play:1 to create the surround sound group and connected the Sonos Beam via the optical adapter to a Samsung UE40H5303AK TV. The audio/video source is a fourth-generation Apple TV also connected to the Samsung TV via a HDMI 2.0 cable.
With the configuration:
Apple TV > HDMI > Samsung TV > Optical Adapter/HDMI > Sonos Beam
the audio input to the Sonos Beam (verified through status page on the iOS app) is always and only "Stereo".
If "Dolby 5.1" is forced on the Apple TV instead of "Best available quality", there's no audio output at all.
In this situation I assumed it was a problem of the television that does not have the audio passthrough on the HDMI.
So I decided to buy an SPDIF/HDMI splitter (that supports HDMI 2.0, 4K and 3D) in order to separate the audio from the video component before entering the TV.
With the configuration:
> Video HDMI > Samsung TV
Apple TV > Splitter
> Audio SPDIF > Optical Adapter/HDMI > Sonos Beam
the result is the same.
I tried all the combinations of Apple TV's audio settings (Best, Stereo, Dolby 5.1) and splitter switch (Pass, 2.1, 5.1) but there's no way. Sonos Beam always shows "Stereo" and if I play a Dolby 5.1 channel test the 2 front and the 2 surround channels are mixed together.
Has anyone managed to get a real Dolby 5.1 experience with an Apple TV 4th gen and a Sonos Beam?
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