the example would be closer if the sun was shining on a wall directly (like a foot away) behind the window, rather than the room itself. The included angle is a lot less than if the light was shining across the room. So as the sun moved, it's reflection on the wall would move much less than if it was shining across the room. My reasoning is that the capsule is fairly close to the bars. The capsule is close enough that the bars are (almost) acoustically transparent, no matter which way they are lined up. I say almost because the fact they are there has to have some affect on the sound, but in this case I would bet it is so small that the difference is negligible. Also light is more directional than sound. While highs and high mids have directional properties, low mids and lows have very little.
(edited for clarity, but Im still probably not making much sense)
