Originally Posted by mp5475
So for people going with physical in or on ceiling speakers, is in ceiling poor choice if they can not be aimed? Ideally they should not point straight down? Or it's ok if the dispersion angle is wide?
Dolby Atmos people seem to aim them straight down. I'm sure they know what they're doing because those overhead speakers have their own mounting brackets with the option to be aimed @ different places.
So if they chose a straight down aiming it has to be a logical reason. ...My guess is that they are of the wide dispersion type speakers, and if aiming them @ the MLP (main listening area position) they might be too prominent and less immersing. ...And perhaps the reason why some people prefer the up-firing modules instead, with a greater sense of envelopment without calling due attention as to their directional origin.
Is that make some reasonable sense, anyone?
* Plus my previous theory (she still stands, by my own account) on the dual beams effect (sound beam).
...The first beam of sound going towards the ceiling, and the second beam of sound, being reflected by the ceiling's surface, going towards the MLP and its surroundings. ...Two beams of sound multiplied by four up-firing speakers are much more immersing/enveloping 3D wise than just one beam of sound multiplied by four overhead speakers. It's acoustical physics, covering a wider area in a more diffuse/infuse sound envelopment without precise localisation and with better object rendition in a more spatial three-dimensional cocoon.
Our brain is part of the entire processing with DSP in an HRTF (Head-Related Transfer Function) derivative algorithm.
ASP (Analog Signal Processing); I just don't know.
And we also know about the notch filter applied @ 10kHz. ...And the 180Hz crossover.