I have non-progress and good news. First, my sister and her lovely nearly-6-month-old baby are coming to town this weekend, bringing my brother-in-law, who has committed to helping me frame all day Sunday. I'm sure we'll get the rest of the walls up, and maybe the ceiling joists too. (cross your fingers, but don't hold your breath)
Also, my good friend Kim has pulled some library strings (she is a librarian at a "state university system of Georgia" school library) and gotten me my second bit of theoretical reading. If you don't have access to a university library, I suggest you make friends with some librarians - they're good people.
A couple months ago, I actually read (as in, not just referenced, but sat down and read - though not every single page) Acoustic Absorbers and Diffusers: Theory, Design and Application (Cox and D'Antonio). This was not much for good reading. It is, here and there, referenced as some sort of gold-standard in acoustic treatment design and construction. Well, I am not a book reviewer, but I can tell you that a) it's not fun to read (
) and b) extraordinarily technical. If you are not an engineer (the sort who does multi-variable calculus for fun) this is largely over your head in terms of math. While the authors claim it is application-based and practical, that's only in comparison to a purely theoretical treatment of the subject. To be honest, there is very little I read in that book that I hadn't already read in the acoustical treatments master thread - that which was new was largely useless to a DIYer. It does define the general relationships between things like wavelength and diffusor design features, or the differences between diffusion and scattering, but if you're reading the book to learn those things, you're going about this all wrong.
So, tonight I'm starting on my second book relating to home theater acoustics. I'm much more hopeful that this will be fruitful. If any of you have interest in this book, I'd be happy (and interested) to search the book for answers to your questions. Feel free to post here or send PM. Pictures or it didn't happen, right? And if you're curious, this book is a lot bigger, but still less costly than the Cox and D'Antonio - actually reasonable at less than $50, if it proves useful.
Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms, Floyd Toole.