Quote:
Originally Posted by
Bill Mac 
Quote:
Originally Posted by
Theresa
I'm a devoted user of the Omnimic V2. The only drawback is that Bill Waslo, author of the Omnimic software still hasn't released a 5.1 test signal disk that would make it much easier to measure a 5.1 system.
Theresa,
A bit off topic but are you using XT32 with your 4520? If you are how are further tweaking your system using Omnimic?
Bill
Not Theresa, Bill... but I can tell you how I have been using OM to tweak the system, post Audyssey.
For openers, as you know, the graphs in Denon AVRs are fairly basic, and don't even exist in Onkyos at all. Even with Audyssey Pro, the 'after' graphs are only predictions because Audyssey doesn't do any post-calibration measurements. So running OM (or REW) after calibration will show you exactly what you are getting in your room once Audyssey has done its stuff. By making measurements with and without Audyssey engaged you can also see the difference Audyssey is making.
OM is also useful for optimising the splice between sub(s) and the main speakers. This can have a profound effect on bass quality. Audyssey is weak in this area because it measures all the speakers and the subs, but at no time does it ever measure the speakers AND the subs together. You can easily do this with OM and see the result of the interaction between the mains and the sub(s). You will often find that there is a dip at the crossover region caused by phase cancellations induced by the interaction of the mains + subs. By varying Audyssey's sub distance setting (which is really a delay setting as you know, hence the phase issues) you can often make dramatic, audible improvements to the splice. You can adjust the distance in real time and observe the graphed result, which makes it very easy.
OM can also be useful for optimising speaker and sub placement before running Audyssey. As you know, the better the speaker/room optimisation prior to running Audyssey, the better the resulting calibration is likely to be.
OM can of course also be used to conduct many acoustic measurements of the listening space, including waterfalls for bass decay and ETCs for finding problems in the time domain. All of this helps create a physical environment which is better for Audyssey when you get to run it.
. The biggest stumbling block with my earlier attempts at REW was setting up the external sound card. It was very frustrating as I always felt like I was doing something wrong. So eliminating that step it should be much easier. I'll read through the link in your sig and give it a go when I have the time. Any recommendations for a USB mic? Thanks again!
