The image shows the ARC plugin window.

ORANGE CURVE (Before): represents the original measured speakers/room frequency response for my studio main room.

WHITE CURVE (After): represents the corrected speakers/room frequency response.
GREEN CURVE (Target): represents the selected Target Curve.

To cover a wide range of room types, ARC System provides a selection of four Target Curves created by Audyssey.
• AUDYSSEY FLAT
• AUDYSSEY HF Roll-off 1
• AUDYSSEY FLAT (Mid Comp)
• AUDYSSEY HF Roll-off 1 (Mid Comp) Comp = Compensation.

ARC System automatically detects the bass roll off point of each speaker to ensure that no correction is applied below that point, as it may potentially overload speakers.
However, in some rooms with especially odd low frequency issues, ARC’s measurement system can be mislead and set a Low Frequency roll off point that is actually higher than required, resulting in no correction applied to low frequencies even if it was actually needed.

To address this is it possible to disable the Automatic roll off point detection
feature, therefore allowing ARC’s correction to be applied to the entire frequency spectrum, down to 20 Hz, no matter what roll off point is detected. Please note that the maximum boost applied to the low frequency range will anyway never be higher than 9 dB to protect your speakers from excessive boost.

ARC requires that you take a minimum of 12 measurements up to as many as 32.

I've had the ARC for a year or so now and it was one of the best purchases I've made. My room is treated and using the ARC system simply cleared up the remaining issues for me. I have two main sets of speakers: Mackie HR824's and DynAudio BM5A's.

If you have a treated room and still feel that you need something to get it right, I'd suggest considering the ARC as a possible solution.

Tom

∞

ORIGINAL: mike_mccue

It doesn't appear that there is any input for loading a mic's response data.

Do they use a Linear Phase filter to make the adjustments?
How many nodes does it run?
Is it scalable?
In other words does it only instantiate a few poles if that's all that's required or does it run a standard number at all times?

When they draw the white "after" line how many samples do they use to plot the graph?

Is this just for small near fields or do people use this on full size speakers?

I'm still having trouble imagining that this is better than the results obtained with a good hi resolution RTA, 18 to 32 (or maybe 100) measurements with a mic that has a calibration file, and a few tweaks with a nice EQ. Which is in a nutshell, how the THX certified rooms are set up. The room I'm familiar with uses a Klark Technik digital EQ that was set up by the THX squad.

Buy/test/borrow one and try it. Come back and tell us your findings. Why criticise something you never tried/seen/heard? It's like saying "I've not heard it, but that movie or CD sucks".

ORIGINAL: mike_mccue
I don't doubt that it makes you enjoy your room more... I'm just advocating for discussing EQ correction more universally.

best regards,
mike

Start a new topic.

Dude

∞

ORIGINAL: mike_mccue

Do you?

EQ (with enough eq points) + RTA + Time to manually making it work = more then the price tag ARC

Depending on how much you value your time at, my question is why? Is it not just easier to use one integrated tool?

Workflow and ease-of-use come up all the time here, in terms of the tools used, why not this one?

Dude

∞

Thanks for the screenshot and explanation, mudgel.

Question: the orange curve represents the original measurement of the room, but it looks strange. How does a room have nothing happening under 100Hz? Perhaps this is where the sweep begins?

What is the purpose of the "full range bass correction" option, and why would you use it or not use it?

∞

I don't understand all of it either.

You have to realize that I got this thing installed it and ran it.

I physically marked out 14 places on my floor with tape, setup my mic on a stand at the specified height (ear level), and a plumb bob so I could line the mic up over the 14 spots and ran the test as explained in the literature.

I gave no consideration as to why things were done one way or another; I just followed instructions as I wanted to hear this thing working. You have to run it stand alone to create the eq curve before you can use ARC as a plugin.
Then I simply ran ARC on SONAR's master bus and did a bounce of a song with and without ARC.

Now I can take my time and go back and do a few more tests and answer questions like why nothing under about 100hz and so forth.

Of course I didn't realize that there was nothing under 100hz until after I did the test. I admit I hadn't noticed it before with other measuring systems. Maybe my speakers are developing a problem in the bottom end. I'll have to check as they are getting on (23yrs old) a bit.

It'll be interesting to compare this with hardware correction and other software like HarBal 2.3