Originally Posted by Macanudo
I do have a 5.1 setup and did not check the secondary audio status. I will check tonight when I get home! Thanks for the tip.
I am still puzzled why the Spears & Munsil disc works and the AIX does not. The music out of the AIX demo tracks is just awesome!
BTW, I found that in the 7.1 Dolby TrueHD tests, the surround back l/r channels come out of the opposite surround l/r speakers!
I presume you are using HDMI Bitstream output from the Oppo.
You must have Secondary Audio OFF in the Oppo for these test tracks to work correctly.
On your TrueHD issue, double check that you have the surround speakers wired to the correct output jacks on your Onkyo.
The "Left" speakers (Left Front and Left Side) are the ones on your left as you face the TV screen.
The correct mapping for a 5.1 system should have the two rear channels steered to the side speaker on that same side.
If they are wired up correctly and you are getting the rear channels mapped to the side speaker on the opposite side, then that is a bug in your Onkyo.
On your DTS-HD MA issue, this is a problem in your Onkyo.
A DTS-HD MA track has embedded inside it a traditional, lossy, 5.1 DTS track for compatibility purposes. The full lossless audio is decoded by first decoding that "core" track and then adding in "extensions" to take care of the stuff that would otherwise be lost in that lossy core track.
So one possible flaw in a decoder is that it might mistakenly decode only the core track out of that bitstream. To check for that, the AIX 7.1 DTS-HD MA Channnel-ID track has flagged the lossy "core" DTS portion embedded in that track to play at very low volume -- 40dB or more down from normal.
So what's happening is that your Onkyo is receiving that 7.1 bitstream but only decoding the lossy core found in it. (If you turned the volume up enough you'd hear it -- don't forget to turn the volume back down again.)
The odds are, this is related to you telling the Onkyo you have a 5.1 speaker system. To check this, temporarily lie to the Onkyo and tell it you have a 7.1 speaker system -- even though no rear speakers are actually wired up.
When you play that AIX DTS-HD MA track again I bet you'll hear it at normal volume.
The 7.1 TrueHD track can't have that identical problem because its compatibility audio is actually on disc as a separate, "associated", DD5.1 track. So the problem of processing the wrong track in the Onkyo could only happen if the player itself was sending out the wrong track. To detect that, AIX has built the "associated" track to play a short voice message that your system is not set up correctly. If you'd like to hear that, turn on Secondary Audio in the Oppo and play that AIX 7.1 TrueHD Channel ID test track. Enabling secondary audio mixing forces the Oppo to use the compatibility "core" or "associated" track instead of the full lossless track.