I'm aware that Playbar's built-in accelerometers automatically sense its orientation and adjust its sound accordingly. But how? Or rather, to what? Specifically, what are the technical and audio differences between laying it flat and standing it on edge (or wall mounting)? Does changing the orientation simply change the equalisation (bass/treble/loudness/speech mode), or is there something else going on? Why does panel location make a difference? Which orientation is better for music? Which is better for movies?