"Official" Audyssey thread (FAQ in post #1) - Page 678

Originally Posted by Mackle

There is a low filter on at the back of the amp that ranges from 20hz to 60hz (I'm sure it's pretty irrelevant also mentioning the high filter of 40hz-120hz, but I'll do it just in case!) and maybe that could be used to null the overboost but I would guess that I'd need to adjust that after running the Audyssey MultEQ XT setup so that Audyssey doesn't decide to boost certain frequencies even more - or would it just assume that the speaker can't reach that low and not apply so much boost if for example I set the low filter on the back of the sub to somewhere between 35 and 60hz and then ran the Audyssey setup?

Originally Posted by beekermartin

I ran Audyssey again tonight raising my sub gain to 1/2 then to 3/4. Of course that didn't help with the other channels all being set to -12 db. All it did was lower the sub gain from -3.5 at 1/4 to -13 db at 1/2 and -15db at 3/4. The rest of the channels remained exactly the same as the other times I've ran Audyssey. I've lost count now how many times I have ran Audyssey but I am getting very consistent results. Every channel is being set to -12db except for the center -11.0/-11.5 and the sub of course varies depending on where I set the gain.

I also ran it with the mic placed in the middle of the room instead of the primary seating position. Just as I thought the results were exactly the same except it set the center to -12db instead of -11.5.

So I've elminated the sub gain as the problem but that is about it. I guess I could try running Audyssey with only the left and right front channels connected. Just to see if it still sets them at -12db. If it doesn't then I will add a channel and rerun it until it does. Maybe that will narrow down what the problem could be. I don't think it will but that is all I can think of to try next. Besides trying a different mic of course.

This is starting to drive me crazy.

Originally Posted by audyssey

The level setting is done independently for each channel. It has nothing to do with where the sub or other channels are. The intent is to set every channel to reference level. That means each speaker should measure 75 dB SPL (C, Slow) when using the internal test noise of the AVR with and the master volume is at 0.

You seem to be concerned by the large negative trim values. But, these are just relative numbers. They depend entirely on the sensitivity of the speakers, the distance of the first mic position, and the room gain.

Your speakers have a non-standard radiating pattern so there can be some peculiarities depending on the conditions. The distance measurements are accurate because they are only based on the low frequency content. The level measurements may be thrown off because not enough high frequency energy is reaching the microphone (e.g. due to an opening to another room).

Why not just set the levels with your SPL meter? It sounds like a 3-4 dB adjustment in the fronts will bring them to 75 dB. No need to go crazy...

Originally Posted by beekermartin

IIs there any downsides to setting the levels manually using a SPL meter?

Originally Posted by audyssey

No downside assuming your SPL meter is accurate...

Originally Posted by beekermartin

Now I am going to compulse about the meter being accurate!

It appears to be accurate. I can hear the fronts are lower than the rears using the test tone. The meter confirms that. Should I use the meter for adjusting the sub? I've read that the rack shack meters are not very accurate for setting subs.

Originally Posted by beekermartin

So once I give up and decide to set the channels manually should I leave the sub where Audyssey sets it?

I assume I should find the highest channel and raise the other channels to match. The rear left is closest to the primary seating position and it is the loudest.

Originally Posted by audyssey

Yes.



Actually you should make them all hit 75 dB SPL (C-slow on the meter) using the internal narrowband pink noise in the AVR.

Originally Posted by RMK!

I hope you can clarify this issue. Are the dual sub outs of the new Integra DHC 80.1 distinct separate channels that Audyssey will measure (distance and level) separately?

Originally Posted by audyssey

Yes, Integra allows individual control of each sub in the 80.1. So, trims, delays and MultEQ XT filters will be set separately for each sub.

Originally Posted by audyssey

I am not sure there is a way around this considering the very ...unusual feature in the amp sub. It applies a low frequency boost that is signal dependent. So, it will do one thing when you measure with the MultEQ chirps and another when you play content. If there is a highpass filter in the low frequencies (20-60 Hz) then I would suggest using it after you run MultEQ to see if you can filter out the very low end, but that would not make this a very gratifying sub experience...

Originally Posted by Mackle

Just out of interest, what would happen if I set the filter on the back of the sub to (for example) 80hz and then re-ran the Audyssey setup - how would Audyssey likely set up the filters on the sub channel with the sub configured this way?

The other thing that I suppose I could do is run Audyssey with my system configured as a 7.0 and then re-enable the sub afterwards

Originally Posted by RMK!

Hi Chris,

I hope you can clarify this issue. Are the dual sub outs of the new Integra DHC 80.1 distinct separate channels that Audyssey will measure (distance and level) separately?

Originally Posted by audyssey

Yes, Integra allows individual control of each sub in the 80.1. So, trims, delays and MultEQ XT filters will be set separately for each sub.

Originally Posted by LarryChanin

Hi Chris,

After allowing individual control of delays and trims, the DHC-80.1 will "ping" both subwoofers simultaneously and calculate one set of filters to correct the combined response?

Larry

Originally Posted by pepar

Don't think so, Larry. AFAIK, that remains the advantage of the AS-EQ1/Subwoofer Equalizer.

Originally Posted by LarryChanin

Hi Chris,

After allowing individual control of delays and trims, the DHC-80.1 will "ping" both subwoofers simultaneously and calculate one set of filters to correct the combined response?

Larry

Originally Posted by audioguy

I would hope not. Why would you want to do that. The beauty of two sub outputs would be to maximize the performance of the individual sets of subs. The will get combined during playback of normal source material.

Originally Posted by audioguy

I would hope not. Why would you want to do that. The beauty of two sub outputs would be to maximize the performance of the individual sets of subs. The will get combined during playback of normal source material.

It they don't combine them, I am a prospect for the product. If they do, I am not.

Originally Posted by audyssey

Yes, it's actually counter-intuitive... Two perfectly flat subs after EQ do not combine to give a perfectly flat response. Especially if you are interested in a flat response over a reasonable listening area. All of our research on the subject shows that if you first time- and level-align the subs individually and then ping them as one to create a combined room correction filter will give you significantly better results.

Originally Posted by audyssey

Yes, it's actually counter-intuitive... Two perfectly flat subs after EQ do not combine to give a perfectly flat response. Especially if you are interested in a flat response over a reasonable listening area. All of our research on the subject shows that if you first time– and level–align the subs individually and then ping them as one to create a combined room correction filter will give you significantly better results.

In any case, the AS-EQ1 and Sub Equalizer products give you the option to do it either way. The AVRs that support two subs only allow the discrete method for now.

Originally Posted by Kal Rubinson

So would that suggest that the use of either subEQ with one of the prior AVRs would be the most advantageous combination? With a Y-cable from AVR to subEQ, you would use it in a 2in/2out discrete mode but get the MultEQ XT in the AVR to correct for their interaction and "net" distance/level. How would that compare with getting the distance/level individually but not correcting for the 2 subs' combined response as with the newer AVRs?

Originally Posted by audyssey

The best results would come from running a single cable from the AVR sub out to one input on the AS-EQ1 or Sub Equalizer (even if the AVR provides two truly independent and not internally y-corded outputs). Then connect the two AS-EQ1 or Sub Equalizer outputs to the two subs. That way the "y-cording" is done internally in the processor and one can take advantage of the relative time- and level-alignment in the stand-alone box. That's why we made this the default mode.

If you y-cord out of the AVR to the two inputs on the sub processor and run it in 2in/2out mode the sub processor will not apply any relative time or level corrections to the two subs. It assumes that this will happen in the AVR ahead of it, but of course it won't because you are only using one output on the AVR.

Originally Posted by Kal Rubinson

So, either way, this is more advantageous/effective than the 2sub out AVRs that will do MultEQ on each?

Originally Posted by audyssey

Yes

Originally Posted by Kal Rubinson

But, of course, one does have the option of using a subEQ with one input from the AVR and outputs to two subs. The AVR need not "know" there are two subs, right?

Originally Posted by Mike_WI

This may be a stupid question, but using Audyssey Pro with a Denon 5308CI on measure 1 I get the message "no speakers detected" or something like that.
The test tones are going to all of the speakers, and everything seems set up correctly.

What am I missing?

Thanks.

Mike

*edit*
Re-try with quiet room...

"No Speakers were detected. Please correct the system configuration."

The sound is coming out of the appropriately indicated speakers, so that isn't off...