Anthem D2/D2v/AVM50/AVM50v/ARC1 tweaking guide - Page 499

Originally Posted by benleeys

Yea, it's an idea to fiddle with. Set up with SMS-1, run ARC, then fine tune with SMS-1. Or run ARC, then fine tune with SMS-1. Thanks for the suggestion.

Basically though, I am more concerned with the shift of the ARC calculated response peak from 50Hz down to 25Hz whereas peak for the other speakers remains at about 80Hz. Means there's a more pronounced dip between them and I don't think it's a good idea to fiddle with that with the SMS-1.

But we're deviating from my original question, and that is, from comparision of the 2 subwoofer graphs, whether it would be advisable for me to discard the SMS-1 and rely solely on the ARC.
-Ben

Originally Posted by abc999

Ben,

I looked at your graphs again and it looks like you are better off without the SMS 1. SMS1 decreases your 20 to 30 herts output by 10 dB and ARC can manage only around a cut of 6 dB, the resulting curve(with ARC engaged) is better without it.

Originally Posted by abc999

.....SMS1 decreases your 20 to 30 herts output by 10 dB and ARC can manage only around a cut of 6 dB, the resulting curve(with ARC engaged) is better without it.

Originally Posted by Bob Pariseau

In Setup / Source Setup you will find a Room EQ line for each Source you define. Once you have Uploaded results from the ARC application to the D2 the Room EQ = ON setting enables the ARC room correction processing for that Source (and disables other, simpler audio correction tools you would use in a manual setup such as the "Room Resonance Filter").

Originally Posted by barhoram

Just saw that one can engage/disengage ARC on the fly via an RS-232 command. I'm going to set up a button on my RTI remote to toggle so I can do some A/B listening tests.

Originally Posted by Bob Pariseau

Looking at your charts without the SMS-1 -- have you got your sub in a corner? It looks like it is suffering from a severe case of "boundary gain".

Repositioning it, even just a few inches, may do more to fix that 25Hz problem than anything else.

Also, you can't just look at ARC's subwoofer charts in a vacuum. You need to see what ARC has to do to the main speakers as well near the cross overs. I found with my Velodyne DD-15 that having its internal EQ working hard up near the cross over was causing issues ABOVE the cross over which you couldn't really see in the Velodyne's own charts but which ARC was picking up and having to fix in that transition region.

Finally, make sure you are using the latest D2 and ARC software (D2 V1.33 and ARC V1.2.2) to insure that you are getting good Uploads of ARC results to the D2. I think the ARC-only results don't look to me like they should sound all that bad.
--Bob

Originally Posted by benleeys

No Bob, the sub is located more than 4' away from the side walls near my front speakers. That horrid 25Hz is my room resonance, I think because my front speakers have that too (which I tamed by adjusting a 25Hz pot to minimum).



Please see the rest of the graphs below. Noticed that the sub's ARC peak has changed from 50Hz down to 25Hz without the SMS-1. There's no change in the low frequency slopes of the rest of the speakers.



Am using D2 v1.31c and ARC-1 v1.2.4. The upload went without a hitch on my newer PC this time.
-Ben

Originally Posted by Bob Pariseau

The Flash Eraser is on the password protected download site. So they just have to point you at that.

But as usual, I recommend people do NOT use Flash Eraser until instructed to do so by Anthem tech support because it may wipe out important clues they can use to figure out what happened -- i.e., to keep it from happening again.
--Bob

Originally Posted by Bob Pariseau

Hmmm. Living in a kettle drum?

You might want to double check that your Center speaker doesn't have Richard Syndrome -- loss of a woofer?

My guess is that since your room modes are so severe, you may be hearing more than usual room response variations at different listening positions even after ARC-1 is turned on. Applying some bass room treatment materials may be your only good recourse. But there are others posting here who have far more expertise in taming tricky rooms than I have.
--Bob

Originally Posted by barry burman

The other night I turned on the TV and got picture but no sound, on the HD channels. Sound was there on the standard channels. MY system is a bell express view with hdmi to my anthem. I switched to optical cable and got
sound. Any ideas? The system worked before . I also tried a new hdmi cable.

Originally Posted by abc999

Ben,

Are you're front speakers toed-in? It seems tha t you are loosing too much high freq. beyond 5k. If you have not done so, why not toe-in the fronts directly to your main seat and run ARC again. Just a thought.

Originally Posted by The Bogg

There's a nice ARC review on ultra audio (part of soundstage), fyi.

Originally Posted by Bob Pariseau

CONFIRMED: As Documented, ARC Disables/Ignores Older Setup Menu EQ Options

I did the tests with my Velodyne DD-15 as described yesterday, and I was able to confirm that ARC does, indeed, disable/ignore the Room Resonance Filter, THX Ultra 2 subwoofer, and subwoofer Boundary Gain Compensation settings in the Setup / Speaker Configuration menu for sources where Room EQ = ON is set after Uploading ARC results.

(Center EQ is supposedly also disabled/ignored, but the Velodyne's test sweep tones don't go high enough for me to confirm that.)

There is no change at all in the Velodyne's charted test curves regardless of how you set those older EQ tools. With Room EQ = OFF (i.e, with ARC's room correction processing disabled), those older EQ tools are functional again.

All of this is in accordance with the ARC documentation: See Section 3.15 of the updated V1.3x Operating Manual.

NOTE: I did *NOT* do re-Measurements as part of this, so I can not confirm that any settings that might be in place for these older EQ tools are ignored by ARC during its Measurement phase. However, the documentation states that you can ignore those Setup menu settings if using ARC, and I'm pretty sure that means not only during normal listening after the fact but also during ARC Measurements, i.e., when setting up ARC to begin with.

I do know from my current ARC Measurement charts that my subwoofer is showing the sharp rise as the Measured curve drops down towards 20Hz that is characteristic of Boundary Gain -- even though I have THX Ultra 2 subwoofer and Boundary Gain Compensation turned on in the Setup menu. Based on prior experiments I've done using the Velodyne test system, I know how much Boundary Gain Compensation would reduce that if the filter was mistakenly being applied during ARC Measurements.

So even though I didn't actually do ARC Measurements both ways to nail this down, I think this is pretty good evidence that ARC is, indeed, *NOT* applying Boundary Gain Compensation during its Measurements -- as of course it should not since ARC's solution to that issue is much more general and sophisticated than the simple, "one size fits all" filter applied by the Boundary Gain Compensation setting. I.e., you want ARC to see the real problem down there, so that ARC can handle all the necessary correction, rather than what's left after Boundary Gain Compensation is applied.

-----------------------------------

I know there were some who were hoping the Room Resonance Filter could be applied on top of the ARC stuff -- possibly during ARC Measurements, or possibly after the fact. I'm not really sure that's a good idea since I don't know how a simple parametric filter (as used in the Room Resonance Filter) would interact with what ARC is actually doing. But in any event, the current documentation is correct: The Room Resonance Filter is NOT applied for sources where Room EQ=ON is set to enable ARC's more general room correction processing.
--Bob

Changes:

v1.2.4:

1. Added ARC to AVM 30-HD, AVM 40 and AVM 50. These models require new DSP hardware to run ARC. If so equipped, "AVM 40/ARC" or "AVM 50/ARC" is displayed at power-on. Software v1.33 or later required.

2. Fixed problem occurring if subwoofer level would be out of range, preventing upload.

Originally Posted by Bob Pariseau

The install notes for ARC V1.2.4 (on the password protected download site) have just been modified. The "changes" from V1.2 now read as follows:



This is the first confirmation I've seen that the AVM-30-HD will be upgradeable to add ARC (as makes sense since it is, after all, the equivalent of an AVM-50). But note that there is *STILL* no indication that the unmodified AVM-30 will be upgradeable to add ARC -- short of also doing the more expensive AVM-30 to AVM-30-HD upgrade as well.

Note also that the power on sequence will identify an AVM unit that has had the DSP hardware upgrade added. Presumably this is true even before you do your first Upload of ARC results to it.
--Bob

Originally Posted by jayray

Bob,

where on the protected site is the 1.2.4 file. downloaded link1 and nothing in there.
John