Originally Posted by blazar
You are spending a lot of time sweating the subtle details of speaker location and angles. Honestly, having already done this, I'll tell you that you will barely notice one way or another. Mainly this is because your ears/brain simply cannot localize these sounds perfectly anyway. On top of that, you have no movie screen on your ceiling and therefore there is no "exact spot" the sounds have to emanate from. In other words there is no point of reference. Lastly, future processors will do "true atmos" and the system will accomodate for wherever your speakers are and whatever number you may have. That is literally the whole point of object oriented "3d" sound.
Just put in as many speakers as possible to cover as much of the walls and ceiling evenly as possible. That's really all it takes to do it right. Flush mount without worrying about the exact angle will more or less work fine, despite off axis issues.
Well... from having done what I have been doing, I can definitely say that when playing a mono signal to all ceiling speakers - there's definitely differences in experience from just moving them an inch or even less. So if they will be playing Auro-3D Voice of God channel at some point, I think the time is well spent. The less your brain needs to do to decode sounds, the more relaxed you will be listening. That's how it is with stereo, I expect nothing less to be true for multi-channel.
Most people on this site is "movie people", I'm primarily an audio (music) person with a secondary movie interest. My aim is that the reproduction is truthful to what is recorded on the media. The point of reference is on the media and therefore should sound as it comes from the exact same spot in my theater, in your theater, in Roger Dressler's theater and so on. And also in all seats. If it doesn't, then it's not very High Fidelity over it, is it?
I'm not conviced that the Atmos approach to three dimensional sound is the correct way to go. It may be the best way to get AN experience to people, but I think to get THE experience to people it will have to be more of a wavefield synthesis approach. But we have to go with what's available for sure...
BUT, with all things said - I do appreciate what you said. And I'm quite sure that once you're playing all channels at once and actually watch something that you have a good and practical point.