Originally Posted by audyssey
Yes! Well sort of... There will still be some bumps, but if you measure with Audyssey on and off and average 6-8 measurements then you will get a much better picture of what is happening in your listening area.
The room correction algorithm needs data from many points in order to properly correct the sound within the listening area regardless of the number of listeners.
It seems that Lyngdorf Room Perfect and Audyssey are doing similar room measurement method. Room Perfect uses two sets of continuous test pulses, one in the upper freq band and one in the lower freq band. The lower freq band test pulses sounded like some kind of wobbling tone, as if you're in a submarine. My audio engineer friend thinks that this type of correction is more akin to smoothing room modes; to even out bass sound instead of true room correction.
Try this experiment: Use the LinearX mic to calibrate MultEQ in one spot only. Don't touch the mic after you are done. Then connect to your measurement system and measure the response. You will be amazed at how flat it is. But, you will also be amazed at how bad it will sound.
Sounds like an interesting experiment! I'll try it out in the weekend. TacT RCS is essentially measuring this way, but it sounds fantastic! One must note that TacT uses a completely different test pulse pattern for the measurement.
I'm afraid I lost you on the "harmonics dropped" statement. Are you saying you did a time-frequency analysis and found missing harmonics?
Chris, are you an audiophile? The time-freq analysis is all done by human ears with different listeners involved.
A good test track will be "A Time for Love" by Melissa Walker. This is a piece very rich in piano harmonics and excellent female vocal. With the Denon mic for measurement, the piano harmonics seems to be missing. The vocal has a layer of fog or veil to it. With the LinX mic on the Denon amp or TacT RCS, the harmonics is very rich and one can feel the weight of the piano note from the piano player. Could it be the fact that I have a 6db FR variation from 200Hz-1Khz using the Denon mic, such that certain freqs got attenuated by 6db and got interpreted as missing harmonics?
I've to warn you that it does require very good amplifier and speakers to discern such differences (Denon 5308ci is good, Onkyo 906 is not). My speakers have ribbon tweeters.
Finally, have you guys ever used different mics for Audyssey measurement,(from the $1 panasonic capsule to the $6000 B&K and calibrated them using pressure-field calibration), and detected no changes in the final sound? Would the mic's other attribute such as impulse response, mic diaphram settling time, distortion, etc. not affecting the quality of sound? Or the FIR filter's smoothing parameters have effectively "smoothed" them out? The empirical result I got with the LinX mic is very positive, but so far the evidence I have is a "tighter" FR curve so that I don't get a 6db variation from 200Hz-1KHz...