"Official" Audyssey thread (FAQ in post #1) - Page 693

Hi Mike,


The Wides and Heights for Audyssey DSX should be direct radiators (not dipoles or... quadrapoles--don't know what that is).


This is the same requirement for having the front L, C, and R at the same height: pans will sound strange (like smiley or sad faces) if your speakers are not at the same height. Same goes for the Wides.

Perhaps the issue of having it both ways with limited processing power?

Hi Jeff,

You'll have to ask rnrgagne to find out what his specific complaint is.

With regard to what Chris refers to as evangelism on the subject, posting #19458 discusses the controversy regarding equalizing over the transition frequency.

In posting #19469 Chris discusses the subject further.

Larry

Do you run "full range" speakers on the main channels? Or would you prefer more precise correction on the subwoofer channel? The former, I'd guess, based on you SubEQ for all channels comment?

Also, I'd guess you want this as a free firmware upgrade?

It seems that would be a bad guess on anyone that has been in this thread for a while.

Also confused by "free". I would suspect innovations with new models.

What I suspect is, once again, your espresso has not kicked in yet.

Thanks for the recap, Larry. I am familiar with this and have read the posts you link. I exchanged PMs with catapult after posting on another thread. He is of the opinion that "With a good speaker in a good room, EQ above 3-500 Hz shouldn't be necessary at all." And I replied that I think it requires a great speaker and a very well designed room. According to Chris, Audyssey's research shows that those are not possible and/or will not matter.

I know that MultEQ XT gave me by far the best main/surround and main/sub integration I have ever had ... right up until the MultEQ Pro calibration was done. And then it was even better.

You are right ... about the espresso ... I haven't pulled my ristrettos yet.

If one is not running mains as large, why would more correction power need to be concentrated under 80Hz on all channels?

Maybe for the greater good? ...


and Chris gives at least tacit approval?

Former - a bit vague - and sappy - for a "science' forum.

Latter - out of context and/or stretched to fit your position.

Jeff

Waiter, check... Please!!!

Or at least get out of the kitchen.

Here is a link to the specifics for my Audyssey Pro kit attempt #3 -- LINK.

The PDF of graphs is enclosed.

It looks like most of the "after" graphs are close to flat or as expected high frequency curve.

Anyone know why my sub graph is flat, but BELOW the reference line?

Thanks

Mike

 

Audyssey Customer Certificate 11-21-09 - 12 meas - 80Hz cutoff.pdf 147.958984375k . file

Thank you for the clarification Chris.

Chris addressed my questions, obviously..

Hi Chris,

I tried both direct radiators and bi-poles in both the wide and height positions and while I found that the direct radiators were clearly superior as wides the bi-poles were also clearly superior as heights. Not trying to confuse the issue for those looking for advice but I think your system is pretty flexible in this regard.

I just wanted to throw this out there incase someone has an extra set of bi-poles they might be thinking of using as heights since IMO it's worth giving them a try before buying another pair of direct radiators.

One caveat, I'm using the quadrapole mdrew spoke of (really Axiom QS8 bi-pole with tweeters on the horizontal plane and midranges firing up and down). They have an uncanny way of sounding both direct and diffuse as need which may be why I feel they work better as heights than the direct radiators did.

Cheers,
Dean

Hi Jeff,

Yes, equalizing above the transition frequency is controversial, even among respected professionals. It seems that with the advent of powerful DSP chips that more of these respected professionals are pursuing equalization over the full audible range. For example, Dr. Toole has historically been skeptical of high frequency equalization, yet now we see his protégé, Dr. Olive, doing precisely that with his room correction prototypes. This of course means that most speaker's responses will be altered, even on the high end, to varying degrees regardless of how "good" the speakers are.

Here's an interesting response by Dr. Olive to me on this issue.

The Subjective and Objective Evaluation of Room Correction Products

It is also interesting to note that timbre matching approaches, whether it be THX's, Audyssey's or other's, absolutely requires equalizing above the transition frequency. The fundamental reason for doing this is to deliberately alter each speaker's response to make them psychoacoustically similar regardless of whether they are in the front or rear.

Larry

Mike,

All of your graphed responses were below the reference line. (The sub's line was a bit lower than the others.)

FWIW, all of my responses were below reference as well.

In my room the Wides need to be 21 ft apart in the corners because of windows between them and the LCR speakers. My seating distance is approximately 10 ft. This is over 90 degrees whereas the Audyssey spec suggests 60 degrees. Just how much will this mess up the sound?

Thanks!

Louis

Just curious, what angles are your L & R speakers at in relation to the main position?

Has anyone tried to use the Audyssey Pro mic and mic preamp in another application like REW? Did it work?

Center to center they will be 7 ft apart giving an angle of just under 40 degrees.

Louis

It will "work" but the cal file can't be loaded into REW.

No way to get the Wides to 50° or 55°?

I think you are misunderstanding the recommendation. You are thinking of 90deg between the two speakers. The recommendation is 60deg each from center line.

If your speakers are 21 ft apart, and you are sitting 10 ft away, they are just over 45 deg off center. You can actually locate them farther apart to get to 60 deg.


You made the same misunderstanding here, Louis. Your fronts are each 20 degrees off center and could be moved farther apart to be nearer the 30 deg recommendation.

Bill

Obviously.

Bill,

Are you saying that the recommended spread for speaker to speaker on the wides is actually 120 degrees?

Louis

That's what the figure shows. Everything is measured from the front centerline.

Good pickup.
Thanks.

I guess it was more noticeable becuase the sub line was so flat and looked near "perfect" so I wondered why it wasn't dead on reference.
Of course, if they are all X dB below reference, than relatively everything is okay.
I guess I could now ask why that convention was chosen.

I may stop tweaking for a little while and actually watch some movies and listen to music!

Mike

Always an excellent idea.

Yes.