Wall Mounted Dolby Atmos 5 1 2 Speaker Placement

To add overhead sound you can use two or four speakers mounted in or on the ceiling or use dolby atmos enabled speakers that fire sound upward toward the ceiling from where it s reflected back to the listening area.
Wall mounted dolby atmos 5 1 2 speaker placement. A 9 1 2 system adds a pair of front wide speakers to a 7 1 2 layout. To create an optimal sound system enabled with dolby atmos first familiarize yourself with the role and position of each speaker. Dolby atmos speaker layouts parallel the 5 1 and 7 1 setups for surround sound. I am adding 2 top middle speakers to my existing 5 1 setup to create a 5 1 2 atmos.
For example i ve seen compact speakers with sloped downward pointing baffles that are designed to be wall mounted near the ceiling. The naming of dolby atmos speaker configurations is based on the standard nomenclature stereo 5 1 and 7 1 but adds a number at the end to specify the number of height speakers in the playback system. So if the first digit is a 5 for example this means there is a left center right and a pair of surround speakers. The next digit is the number of subwoofers.
Then choose a central seating point and angle your speakers at it keeping them at your ear height when you are seated unless noted otherwise. For example when we refer to a 5 1 4 setup the 5 indicates the left. The ceiling is 8 feet high. I am wondering how far in front of the listing position i should place the top middle speakers.
Dolby atmos speakers either go in the ceiling or on top of your main speakers to fire up and bounce off the ceiling. Stand mounted on wall and in wall speakers that currently produce. Got a tech question for sound vision. I have read it should be 80 degrees but i am looking for a rough estimates in feet.
A 5 1 2 or 7 1 2 system uses two ceiling speakers or two dolby atmos enabled speakers or modules.