Auto detecting external audio system: ARC/Optical out...
So, after much frustration with phantom input switching and other oddities (since the recent firmware update), i did a full factory reset of the TV on Friday, and after painstakingly putting in all of my custom picture settings, i'm back up and running. and no more phantom input changes and now, when i sleep the Apple TV (HDMI2) forcefully, it wakes up properly and no more flashing screens between detected input and showing the input.
at that time, i also made sure to turn off all Bravia Sync stuff, and i also moved around my inputs so that my Emotiva Processor, originally connected to HDMI3/ARC, is now on HDMI1 to avoid any possible CEC issues. i still have my audio optical output connected to my Emotiva processor.
so, prior to this reset and making sure all Bravia Sync was off (i thought i had it all off previously, so really, the only switch i think is HDMI1 from HDMI3), when i only powered up the TV to use the Tivo (HDMI4), it would automatically select the TV's built in speakers. and then when the Emotiva was on, it would automatically switch to the 7.1 audio system.
so, based on this (i plead ignorance so sorry for the lame discussion/questions): do i need to go back to HDMI3 in order for the TV to properly choose which audio output to use. i had falsely assumed this "feature" would work with an optical cable connected, but that's apparently not the case...
i'm a little wary of going back to HDMI3/ARC for the Emotiva because that may bring back the other issues i was having.
sorry for the rambling message... just want to try to understand what the TV is doing with the two potential ways of outputting audio from the TV to the audio system.