I want connect my Apple TV 4K to my amp throw eversolo I set speakers tv to arc I connect apple tv to hdmi 1 and the arc from tv to eversolo I set in eversol intermal play and hdmi out I didn't heard any sound also when I play Netflix from lg direct to eversolo at opti its work fine
The HDMI is for output (audio only, max 5.1 channels) to (for instance) an AV-receiver. It is all clearly described in the specifications of the DMP-A6. No where it states that it is a HDMI-ARC connection. Connecting your TV via optical should work and I see in your post that it does.
Something like this - 5/3 Port 4K HDMI Splitter Auto Switch Switcher HD 1080p Selector Hub iR Remote | eBay