Originally Posted by LastButNotLeast
Originally Posted by kbarnes701
One thing I am undecided on at this stage is whether to run Audyssey first and then use the PEQ as 'icing on the cake' to make final tweaks to the FR OR to run the PEQ first to get the response where I want it and then run Audyssey.
Since you can't make any adjustments to Audyssey, my suggestion is to run Audyssey first and then use the DSP to fine-tune the results.
Thanks. I think this is the way I will go. Craig John gave me the following answer in the SubM thread:
"I haven't used the Behringer device, but I have used the Velodyne SMS-1, (which is also an external PEQ), in conjunction with Audyssey. My experience in my own system was that running the PEQ post-Audyssey yielded the best results. (In fact, you have referenced that result in your FAQ.) That result was based on pretty decent pre-Audyssey FR, with no huge peaks or dips that Audyssey had to deal with. The SMS-1 was only used to tweak the final FR a few dB after running Audyssey. For that purpose, it worked extremely well.
"However, in another system, I found that using the SMS-1 pre-Audyssey to reduce a huge 25+ dB peak was a significant benefit to the final Audyssey result, Without the huge cut implemented by the SMS-1, Audyssey was expending all it's resources to remove that peak and was therefore less effective at other frequencies. Audyssey has, (IIRC), about 9 dB of cut capability at any one frequency. If that is not close to enough cut for a huge 25+ peak, an external PEQ can be used effectively before running Audyssey to improve the response Audyssey "sees" prior to it's filters. The better the FR Audyssey is given, the better the final result.
"In addition, and more importantly, the "Volume Normalization" process was negatively affected by this huge peak and lead to the well-documented ULF boosting. Reducing the peak with an external PEQ reduced the need for Audyssey to increase the overall level, which reduced the ULF boosting seen with the Volume Normalization process.
"Bottom line, I think the best answer depends on the pre-Audyssey FR. If your system is pretty good to start with, Audyssey by itself can be highly effective, and the external PEQ can be used post-Audyssey to "tweak" the final result to good effect. However, if your pre-Audyssey FR has a single huge peak that dominates the response, the external PEQ can be used pre-Audyssey to great advantage to reduce that peak."
As I fall into Category 1 above, I will follow your, and Craig's, advice initially and see how I get on. Thanks.