On Mon, Mar 10, 2014 at 09:50:43PM +0000, Steve Boardman wrote: > Stanford's CCRMA room does look (and undoubtably sound) good, but > the space below is maybe a bit over board for what I want to achieve, > in the space I have. The actual area of the build space is probably > around 180 square foot within a bigger space of 700 square foot on > two floors.
As an example of what can be done without digging holes in the ground have a look a this: <http://www.rossinispace.org/>. This is at the conservatory of Pesaro, Italy, and the best sounding and most accurate higher order Ambisonics studio I know of. Size should be comparable to your 180 sq.ft. Shape is approximately a square, but with no parallel walls. The space has a very low RT60 down to LF (bass traps are planned but not yet operational), the idea being that in AMB mixes most of the space should be provided by the signal and not by the room (which makes sense, creating virtual spaces is one reason to use full surround). The control desk, shown against the wall in the panaromic picture, can be moved to the center. The speaker system consist of * a ring of six at elevation -33 degrees (ideally this should be -45 degrees, but this requires an elevated listening position), * a ring of eight at ear height, * a ring of six at +45 degrees * a speaker at the zenith. * one subwoofer for a total of 21+1 speakers. This is an excellent setup for third order, in the sense that the decoder matrix is very well-conditioned (it doesn't rely on signals that would cancel acoustically). If you have four subs there's no reason for not using them (put them in the corners, with a dedicated decoder). One thing that could be improved is that the current ring of eight is oriented such that there is no front speaker. The alternative, rotating it 22.5 degrees, would provide a layout that is more compatible with formats such as 5.1 or 7.1. One point not yet mentioned in the replies so far is that for lower order (and in particular first) you should use less speakers. Also for this the rotated ring of eight would be better - the subset used for first order at the moment does not have L-R symmetry. Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow) _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
