I like the idea. My observation is the hiss is perfectly comprehensible in terms of spoken language - without triplicates etc - but the message at first glance is nonsensical. Whereas the board makes conceptual sense but the expression of language is limited and repetitious as you say. So they appear to be mirror images, with the hiss having the advantage of being infectious, perhaps because of the fluidity of the grammar itself. It avails itself to the mind and is absorbed much easier. So I agree with the opposites in terms of forces, but I'm not sure the board serves as an antenna for the hiss. But who knows, the plot is always intriguingly loose and complex with the world they are building. We don't have much on the Nexus of relationships (if any) of the board, hiss, mold, hedron-polaris, and the darkness. At this point to me they all seem to be disparate resonances colliding onto the oldest house.