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In Reply to: RE: really? do the math (it's easy!) posted by tomservo on March 06, 2017 at 10:09:53
Thanks for your thoughful and useful post.
Room modes are definitely an issue. Here's a related story: Back in 1982, I wrote a BASIC program to calculate room modes and print the results. Whoa, dude, 1982?! Yeah. I was sick and tired of calculating and plotting everything by hand! Hey, remember slide rules?! Fortunately, they were past their prime when I was in high school.
"At the dimensions of a living room and typical loudspeakers it is usually the specular reflections close to the loudspeaker which harm imaging the most, and the side walls are often the source. "
This is common "wisdom" and is total bullshit.
But then, I'm a recording engineer and a musician, so what the heck do I know?
"But then, I'm a recording engineer and a musician, so what the heck do I know? "
Well think about it, in a real studio, which end is dead and close to the loudspeakers when traditional front sofit mounted speakers are used?
When near field / meter bridge mounted monitors are used, how far away in time and level are the closest wall reflections?
To preserve stereo image, suppressing any strong reflected sound within say 0 to 10 ms of the source is usually audibly beneficial, something like directivty in the way it increases the nearfield where the direct sound dominates late reflections.
Actually, I have thought about it. A lot. :)
The room is an integral part of the sound, and, early reflections contribute to the sound.
But, speaking of soffett-mounted speakers, when I moved to Dallas decades ago, my (now) old buddy Russ Berger invited me to his home, and guess what?... He had Altec 604's soffett-mounted in his house! Just like they had at the Mastering Lab in L.A. back in the day.
Anyway, here's a recent pic of a room where the stereo imaging was absolutely EXCELLENT without any absorption on the rear or side walls.
Edit: The guy on the right is Siegfried Linkwitz. I don't know who the guy on the left is.
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