Surround sound from Apple TV 4 via Airport Express
Hi.
I have a Apple TV 4th gen. The ATV4 doesn't have a toslink audio output, but i want to connect it to my sound system, so I can enjoy Netflix and other video content in surround sound. I found out, that I can select my Airport Express as a "speaker" and then use a toslink cable from the Airport Express to my sound system. But when I do this, the sound system only recognizes the audio as a PCM 44.1 stereo signal. As an example I tried Daredevil episodes and different films from Netflix. It is always in stereo - not surround. I tried every setting on the Apple TV 4.
I tried two different audio receivers. They are pretty old: Sony STR-LV500 and Sony STR-DE875.
I have some questions.
What audio format does the Airport Express output?
Could the problem be with the receivers?
How do I get this to work?
Thanks.