Man, that's beautiful!
I have a question, is QRDUDE available to download? The eye-candy factor alone is stunning. I'll be making more QRDs for other walls! (Actually, this brings up a question about using different depth/size QRDs on an opposing wall in a small-room, like if I build a 8cm (3.1") depth QRD opposite, with 2cm wells for HF/flutter?)
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I think I'll re-arrange the design pattern slightly, as my frames (4 panels) each hold 22 well-segments. (This goes against the Barker code though.)
Re-orienting from your diagram below, each of your panel pairs (1+2) (3+4) (5+5) (7+8) being one unit, the pattern will change to the "B" option, in my post above. In this pattern: | | = F (Frame of 22 wells = 93.5 cm (3') long).
Note that there is left-right mirror symmetry here (F1+F2 mirror F3+F4), but is it really an issue? It will make the acoustics of my small room more similar, between front and back, I feel, where having a 2N11 left-side and N23 right side will create 'difference'? Or should I not think this way? Anyhow, here is my thought:
For F1 ~ F4 frames:
| N23 | N11+\N2|3/+N11 | N23 |
1. F1: has an N23. I put the zero well on the left, and attach a 'dress up' zero well to the left-side frame member.
2. F2: I shift the N11 so that the zero well is on the left side, and use part of the left-frame as the zero well for it. I shift the N23 so the zero well is at the center of the period (and exact center of the wall and room), and this well spans F2+F3.
3. F3: Last half of the N23 and N11 with its zero well shifted right, and I use part of the right-side frame for that N11 zero-well.
4. F4: Shift the N23 zero well all the way right, and attach a 'dress up' zero well to the right-side frame member.
I note in the above pattern, 3 N23's and 2N11's. Probably it's better to have more N23 periods and fewer N11, given the option... (closer micing, greater 'resolution'). But the symmetry could be a problem.
This is very cool
Very pretty! My friend who's helping with the build is a visual person, so the graphic image is really valuable. Zooming, printing, and posting near our work area will be really helpful.
Quote:
Originally Posted by collo  You can build an N23 as two panels with a packer between....
Here are the N23 and the N11 - re-arrange to get what you are looking for...
I guess two lots of the pattern for 3 panels gives you
N11 N11 N23 N11 N11 N23
This would build up like: Dressing up each end of the completed array of panels with an extra zero-depth well shouldn't hurt anything |