Originally Posted by noah katz
Keith, if what you say below is true than how can Audyssey possibly be trusted to EQ properly in the first place?
Originally Posted by thrang
The after graphs in Pro are not in-room measurements, they are estimated/interpolated. - Audyssey Pro does not, as far as I know, perform an after-cal evaluation.
Noah, I think this is one of the single biggest issues with Audyssey: mic placement seems to have a profound effect on the final result
. Over in the Audyssey thread, a significant number of the 44,000+ posts there are concerned with mic placement and the impact it has on the final calibration. There seems to be no doubt that moving the mic by even a small amount has a noticeable, and measurable, impact on results. These small differences may not matter to the majority of Audyssey users but they do to the Audysseyphile guys on the thread! I think Audyssey is a great tool, and I would not want to be without it, but I don't think many people would disagree that the mic placement is crucial for good results. Thus, my comment that re-running Audyssey post-calibration, in order to measure the resulting changes, is likely to yield different results and thus be pointless.
Does this mean Audyssey cannot be trusted to EQ properly in the first place? I don't know. It certainly seems to be the case that if you run Audyssey twice, using slightly different mic positions, you get two different results. Does that mean it can’t be trusted? Perhaps. Most people seem to experiment with mic positions until they find a set that yields good results in their room, and then they stick with those positions unless there is good reason to change them.
I guess the bottom line is that Audyssey, like any tool, is no better than the person who uses it - and it is by no means the be-all and end-all solution that some say it is. If it was, then nobody would be bothering with Omnimic or REW to try to improve on it.
For the majority of people who buy an Audyssey-equipped AVR, I would say that they run Audyssey and are happy with the result because even when the tool is not used with great skill, it still yields a better result than not using it at all. IOW, it's a great 'black box' solution for most people. For others, people in this thread and the Audyssey thread, it is more of a starting point which can be improved on in various ways - either by tweaking mic positions or settings or buying and learning to use measuring instruments and software, or both.
I'm no expert, Noah, and there are many on these threads who know far more than I do, but the above are my perceptions to date and reflect my current understanding. If I am way off beam, I am happy to learn from those who know more (and in fact this is my main purpose in reading, and sometimes participating in, these discussions).