sevoflurane wrote:
If you disable the option in the audio settings menu to output Dolby Digital, then the optical output will deliver a bog standard PCM output as decoded by a typical stereo component with a D/A converter, irrespective of source material. If this option is enabled, then Dolby Digital material will be output by the ATV via the optical out and will only produce audio if the amplifier has a Dolby Digital decoder.
I assumed this would be true, too. So I connected my ATV to a Vizio Soundbar that only allows stereo digital input with it's to slink connector, and I can't get audio to play through it. I've tried disabling Dolby in the settings. I've also tried different source material, including streaming music to it via both iTunes and airplay.
I have confirmed that the output works with a Dolby Digital decoder I have in my stereo in the other room. Also, stereo audio plays through the HDMI port when I try connecting to another TV.
So far, all of my tests imply that the Apple TV can't output stereo digital through the optical port.