Whatever motivates people to write such excellent free software? That plus Audacity, which I use for podcast production - quite simply, both pieces of software are well written, appear reliable, easy to use and extremely useful. For Room EQ Wizard, all you need is to register with hometheatreshack.com and go to the download link.
Oh, a working knowledge of acoustic theory would be helpful.... it's a steep learning curve!
What I have done is re-read the starter for 10 in Robert Harley's book "The Complete Guide to High-End Audio" and calculated room resonant modes based on the theory that the speed of sound in air is about 1130 feet per second, and so you can calculate resonant modes based on the length, width and height of the room by dividing the number of feet into that number twice (to get half the wavelength) and then multiplying that by 2,3,4, etc for other resonant modes
Confused? Here's a graph:
So my room is 24 foot long, 20 wide and 9 high (more or less). With Harley's calcs, I can see that the primary resonant modes are fairly well spaced apart, with the exception of a small cluster around 190Hz, another around 170Hz and finally a third around 140Hz, all of which are coincidentally not to far away from where the midrange horn of an Avantgarde Duo blends into the sub.
Hmm....
With Room EQ Wizard I can see a bit of a gap -the image below was captured before I decided to raise the crossover frequency on the subs from 140Hz to 170Hz and reduce sub volume and toe the Duos in a bit more. Bit of a gap? I need to measure again, and understand more!
"Whatever motivates people to write such excellent free software?" Comments like that? And because I enjoy it :)
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