Sony STR-ZA3100ES Help Manual page 283

Help Guide
MULTI CHANNEL AV RECEIVER
STR-ZA3100ES/STR-ZA2100ES/STR-ZA1100ES
The Dolby Atmos-compatible sound played back on the TV is not output from the
receiver.
Connect the receiver to an HDMI input jack of the TV which supports the eARC or ARC function, and then perform
the operation described in
using an eARC-compatible TV that supports Dolby Atmos and DTS:X audio
"When using an ARC-compatible TV that supports Dolby Atmos audio
4-686-529-11(5) Copyright 2017 Sony Corporation
output."
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output" or "When