Originally Posted by megaoptimus
I think I have my answer from searching the forum and the manual: I have an m492i and it appears that so long as bitstream is enabled, and the internal speakers on the TV are set to off, the M series model will pass through unsimulated dolby digital 5.1 and DTS 5.1, but that's it. No, HD, or DD+ no matter if you use optical or HDMI audio output, right? Anything above DD or DTS 5.1 will be "down processed" into something the TV can understand and pass-through correct?
I plan on connecting my sources directly to this TV using one of the vizio 5.1 soundbars. I had one already but returned because I think it was faulty. I'd like to try again with a brand new soundbar from bestbuy. I'll be using optical and will do most of my streaming from a PS3 and most of my file viewing from a WD TV 2014 edition.
It's the soundbar and connectors, not the TV - bitstream just means you pass bits through and do nothing with it.
Toslink (coax or optical) is not able to support the bit rates DD+ demands, never mind the lossless protocols (TrueHD, DTS-HD-MA). The original spec for toslink is 3.2 Mbit/s and the DD+ spec says 6.2 Mbit/s, so it will overwhelm it.
Not sure if DD+ will be downgraded to lossy or if the converter extracts a lossy core going from the TV to the soundbar.
But even if you use a soundbar with HDMI inputs (vizio 54" soundbar 5.1
), bitstreaming you can get the DD+ stream to it, but the soundbar only supports DTS and DD decoding.
So basically if you want to hear lossless or even DD+, you need to use a receiver.