Yeah, trapezoid. Oh no! Have all the advanced Maths pushed basic Geometry out of my head?

I forgot about the over-all shape of the area. The already irregular shape will help defeat the standing waves, so the angled walls are not as needed.

Although, if you're building walls, it's not that much more expensive to do more at the same time. Does the kitchen area have to be open? In the original sketches what is the big, solid blue area between the bedroom and the theater?

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-Chris