Axiom Home Page Forums General Discussion Advice from Axiom Owners room correction (Audyssey & Trinnov) with QS4 QS8

I am not sure why Audyssey does this but here is what the EQ curve looks like if I use the "Copy Audyssey Flat" option for the manual EQ. Curve shown is for the m80's, so you can see why there is a serious lack of bass when the EQ curve is on.

Is that for the left or right M80? Is that particular speaker located in/near a corner? Audyssey must be picking up (or think it's picking up) too much base for some reason.

Dean, I wasn't aware of your high frequency roll-off problem with the Onkyo. Although it's correct that Onkyo doesn't provide a separate manual setting to specifically choose between the "Audyssey" and "Flat" curves, that doesn't mean that it can't be done to suit your preference. This has been discussed in several posts, especially on AVS, and the best summary of the options that I can recall is at p.366 of the "Audyssey" thread here , where Rickard from Stockholm describes his excellent study of the issue. You'd presumably be interested in his "a" and "b" categories which allow selecting the "Flat" curve. For example, for music, DPLIIx THX Music could be used.

David, you may be misinterpreting the so-called "copy" feature on the Denon. First, as Dr. Kyriakakis has emphasized, it doesn't in fact copy the many adjustments which Audyssey makes and is just a "crude"(his language)representation at a few specific frequencies. Also, if you're implying that the 63Hz number shown is the actual response at that frequency, that isn't correct; it's the approximate change being made at that frequency, presumably because an elevated room response near that frequency needs to be reduced.

The only way I know to get a close idea of what audyssey has done is to utilize the copy feature. I read in another thread that the manual EQ (even with the copy feature) does not use all of the audyssey corrections.

With the EQ on, the speakers sound REALLY thin and lacking of bass. I think it is over compensating for some reason and turning things down a little too much.

The EQ curve shown is the one for "fronts" not a specific speaker. The right M80 is a a few feet from a corner and the left m80 is a few feet from the hallway and opening into the kitchen. When viewed separately, both speakers get a similar adjustment as shown above

This is using Audyssey or Audyssey Flat (ie. not Audyssey Bypass L/R)? Something's not right then because based on your description of where your mains are located, they should be gettig results that are different not similar.

Also, make sure your receiver has the most current firmware. Updates for my Denon supposedly corrected some Audyssey flaws.

Thanks John, he tried to explain that to me in one of the Onkyo X007 threads at AVS but I he didn’t link to that post and I couldn’t understand what he was trying to get at. If I’m reading that list correctly only the THX modes use the Flat curve which then give the option of using Re-Eq but doesn’t require it. I’ve always been using Cinema, Music and Game up to now which explains why I’m always hearing the roll off of the Audyssey reference curve.

I’ll give those a try this weekend after I rerun the calibration since I just put up my curtains which I’m sure completely destroyed the curve Audyssey already calculated.

I will have to ask him if the flat curve also applies to DPLIIz THX which would make sense if it applies to DPLIIx THX.

Cam –

Copying curves is slightly misleading. From my understanding, if you copy the curve and make manual changes, you cripple Audyssey. In effect, you remove all the filters and are basically using the manual EQ function. I’ll let someone else who understands this program better than go into further detail.

I have had good luck with Audyssey. I prefer it on.

I would also add that all receiver based Audyssey programs are drastically scaled down versions of their stand alone system. Receivers just don’t have the processing horse power required to run the full blown program. It’s almost like taking a knife to a gun fight. You can only do so much with the knife.

Thanks, I don't know any of the steps, i.e. copying curves to change them to flat etc.

I may have done things wrong as well but I can say that in my particular room, the results sound much closer to those described by some as 'thin'. I hate fluffy words for describing sound but that one comes the closest in my mind. I am much happier not using it.