Reply To: The dedicated home theater build codenamed THT

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Well done for finding that

The biggest differences I see are the strict acoustic charateristics requirement for the studio PDF and the variation on speaker angles

I dont think I meet the noise floor or the reverb time for all the frequencies at the moment in my treated post production/sound design home studio with pro studio monitors, it is possible to meet them in a home theatre setting but it will be more expensive and will require input or consultation from an acoustician to do correctly without deadening the sound too much in the wrong places

The speaker angles in each PDF guide will be already taking into account the expected noise floor and reflection pattern of the room the atmos system is installed in, it looks to me that the angle changes may be to alter the reflection pattern angles. The home theatre guide will be expecting moderate to decent treatment of floor and primary reflection points where as the studio guide will be expecting a more professionally designed room treament plan. In a home theatre you want some reflections to remain in the room so you get a larger more immersive sound stage. In a mixing studio we want to only hear the direct sound from the speaker with no room influence at all if possible so we can be 100% sure exactly how the audio file itself sounds in isolation, this type of dry sound environment is often too plain for alot of consumers. E.g. home theatre PDF has side surround flat, they bounce off the opposite wall adding a bit more space and depth to the sound, studio PDF has side surround slightly above tilted down to the listener to bounce the reflection down into the floor to be broken up and scattered around the room

I suspect that the studio PDF layout may be able to result in clearer directionality and sound separation but that does not neccessarily mean better or more enjoyable. Remember we engineers want to critically analyse the audio we hear whilst home theatre owners want to enjoy the film watching experience

At the end of the day you can use which ever guide you prefer but make sure you understand your own goals for your theatre and which of the guides will better suite your goal. Also once you pick a guide to follow stay with only that one for all the speakers, do not mix parts betwen them