MultEQ Target Curves

Hi Chris,

Let's assume for the sake of argument that Audyssey Flat were chosen as the target curve.  I'm interested in the high-frequency behavior of the Audyssey EQ.  Does this mean that the quasi-anechoic response (obtained from the windowed impulse response) would be made flat at high frequencies (well above Schroeder), or is it the steady-state response that's made flat, or something else?  I've used EQ methods that flatten the steady-state response at all frequencies, and they sounded very bright to me.

Also, I assume that in the bass, steady-state must be used because of the low-frequency limitations of impulse response windowing and the need to take into account room modes.

I'm asking these questions because it seems to me that the need for low-frequency EQ for subwoofers and such is self-evident, but also that the best way to do EQ at higher frequencies is somewhat more a matter of interpretation than it is at low frequencies.

Thanks!

Hello,

I am using a Marantz SR5003 with B&W 685, 686, HTM62 and a BK XXLS400 sub in a small untreated room. My back speakers are 1.5 cm from the wall thus I need to equalize the setup. Now I have run Audyssey 6 times with the microphone at the listening position and have been using the Audyssey flat setting for over a month.    Today decided to do a comparison using only stereo music with the equalizer off vs Audyssey Flat for the front speakers and liked it best with the equalizer off (a bit too bright with the equalizer on). Thus decided to go with the Audyssey Front setting so as to adjust all the other speakers to the front speakers characteristics. To my surprise however this setting only deviates from the Flat setting by +2 dB in the 16k band for all speakers. Why is this? Another thing I noted was that for the Audyssey Flat setting the FR and FL speakers were equalized with a graph that was basically a slightly inclined line (higher towards the higher frequencies) with only a few dips with a mean of +3 dB for all the bands combined. (I indeed noted on pans that my FR and FL speakers were less loud than the rest). Would my problems be fixed if I were to just to detract -3 dB for the C, SR and SL speakers and go with the Front setting?

Hi Ross,

The roll off is the same in all products.  We have ongoing R&D to figure out how to customize this for each room, but the benefit of that would be incremental.

A second question:  Does Audyssey Flat use Midrange Compensation as described in your notes elsewhere in this section?

Hey Chris,

I have just recently treated my Room with Auralex studio foam wedges/bass traps (absorbition) and (metro diffusors) and was trying to decide witch curve sounds best since I treated the room. I noticed the Audyssey curve seems to have more tighter bass than the flat curve.....am I hearing things or is this True? I used to like the flat curve because I felt the Audyssey curve was a bit lacking in the high frequency detail (Like when glass is breaking). You stated above that a flat curve would be best for a highly treated room and for someone who sits close to the loud speakers....my speakers are 12 Ft from MLP and below are pics of my room if you can tell me if this classifies as a highly treated room. I have a 9.1 DSX system.

Thanks Chris!!

Hi Chris. I have a question regarding target curves and MultEQ calibration. I understand that the target curve for Audyssey Movie Ref has a slight roll-off. My question is the high frequency roll-off the same for every receiver? I've read that its about 3-4 dbs. Or does Audyssey select the appropriate roll-off for the room. I know THX Mode is just a standard roll-off, so I was wondering if Audyssey roll-off is similar in that regard.
Thanks.