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Apple TV connected to receiver with a 5.1 setup. Do I leave audio format set to auto or should I set to 5.1 option?
Apple TV 4K
If it works for you with surround sound in the ‘Auto’ setting (=PCM Multichannel, uncompressed), then use that. The ‘Dolby Digital 5.1’ settings is a fallback option for when the ‘Auto’ settings doesn’t work in certain setups.
If ‘Auto’ gives working audio for your setup, then that is the best setting to use. You should only use the DD 5.1 option if ‘Auto’ doesn’t work for your setup. It is like a forced re-encoding for compatibility reasons, for other setups.
With ‘Auto’, for 5.1 capable receivers, the receiver will get PCM Multichannel 5.1.
For 7.1 capable receivers with 5.1 speakers, the receiver can do the downmix of the rear channels, if a 7.1 steam is output.
Apple TV doesn’t ever send out 9.1; 7.1 is max.
Apple TV 4K doesn’t offer sending out Atmos if it doesn’t detect that capability. For when Dolby Digital Plus with Atmos is the only available audio in the stream, the Apple TV 4K can easily downmix that to 7.1/5.1/2.0/1.0 as needed. For Dolby Atmos capable receivers with 5.1 speakers, the receiver can do the downmix.
Thanks for your reply but you're not really answering my question. I am not having any audio issues I just want to make sure I have the best selection with MY 5.1 setup. If ATV is sending multi channel audio to my receiver, how does it differentiate between 5.1, 7.1, 9.1 and an Atmos soundbar?
Thanks for your reply, that's what I was looking for.
Audio Format
