DeeringAmps
You can "fix" the peaks that way, but the "nulls" will still be nulls.

That makes sense. Thanks.

 

DeeringAmps
You can "fix" the peaks that way, but the "nulls" will still be nulls.
My guess is that ARC does some phase shifting to "fix" the nulls.
It helps a lot in my room.
YMMV
T

Oh, this is just great.
 
Now we're dealing with real world experiences to muddy the "factual", or is that fractual (sic)?, waters.
 
 

DeeringAmps
You can "fix" the peaks that way, but the "nulls" will still be nulls.
My guess is that ARC does some phase shifting to "fix" the nulls.
It helps a lot in my room.
YMMV
T

A reasonable guess, Tom, based on the fact that IKM don't go out of their way to dispel that presumption. In fact, they're annoyingly vague about what ARC really does, preferring that you just chalk it up to magic.
 
However, the patent can be read online if you want to know more (and have the patience to read deliberately-obtuse patent applications). It makes no mention of phase shifts as a means to mitigate resonances, just a complex algorithm for calculating the gain, center frequencies and bandwidths of parametric filters around measured peaks.
 
And no, sadly it can't fix nulls. The only way to do that is with multiple subwoofers and/or gobs of bass trapping.
 
stickman, you are correct: any parametric equalizer is theoretically capable of achieving the same result. ARC's strength is not in its filters, but in the software that calculates how to set them up. Doing it yourself is possible, but a lot more difficult.
 
If you attempt it, I'd advise just addressing the 3 or 4 most prominent (and broadest) low-frequency peaks, using low-Q low-gain filters, and don't shoot for total flatness. Determine those frequencies by measurement rather than by ear, by recording white noise playing through your speakers. The microphone isn't important, because you're not going to be making corrections above 500 Hz.

bapu 

DeeringAmps
You can "fix" the peaks that way, but the "nulls" will still be nulls.
My guess is that ARC does some phase shifting to "fix" the nulls.
It helps a lot in my room.
YMMV
T

Oh, this is just great.
 
Now we're dealing with real world experiences to muddy the "factual", or is that fractual (sic)?, waters.
 

 
I have a real world experience too. I have enjoyed learning about the various playback enhancement technologies and systems such as ARC, but I am also quite happy with my various speakers just the way they are.
 
When I was twelve I bought a $0.50 book from Radio Shack™ and it explained the basics of placing speakers in a room so that they sound good. Evidently a lot of people were putting their book shelf speakers on, you guessed it, book shelves and in stereo shacks it was common knowledge that this was how you made a stereo sound crappy. 
 
I'm amazed that people are still doing it and suffer for years, and years before they give up and buy Audyssey gear or ARC to make it all work.
 
Opinion: If you are not  going to put your speakers in a place where they sound good you should rush out and buy something to make them seem better.
 
Fact: I know a bunch of guys who have spent more on their ARC software than they have spent on their speakers and now they are happy as can be. It's that good.
 
Good times.
 
 
 
 
spelling
 

mike_mccue
Opinion: If you are not going to put your speakers in a place where they sound good you should rush out and buy something to make they seem better.

But if people do this, isn't it now a fact?

The best place to put shelf mount speakers is actually ON A SHELF...  DUH!!!
 
 
 
 
Just don't make the mistake of plugging them in...

So is the best place to put studio monitors on your studio (computer) monitor?
 
I R CONFUSED. 

You put them behind your computer monitor(s) Ed, so that the sound appears to actually be coming from the wavy lines you see on the screen...
 
 
I thought everyone knew dat

bitflipper
However, the patent can be read online if you want to know more (and have the patience to read deliberately-obtuse patent applications). It makes no mention of phase shifts as a means to mitigate resonances, just a complex algorithm for calculating the gain, center frequencies and bandwidths of parametric filters around measured peaks.

Phase is implied by the words "frequency domain" and any operations in the frequency domain include phase unless you deliberately leave it out.
 
Note that they specifically use the words "frequency domain response" (which includes phase) not "frequency response" (which doesn't).

Karyn
I thought everyone knew dat

I kinda forgot DAT once I went DAW.