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I forgot to mention, using pink noise with a stand-alone RTA, the readings jump around a lot, making precise EQ difficult. That’s why I prefer a sine-wave signal like REW has. However, this might mot be as much of a problem with a software-based RTA, as I expect it will let you take a snapshot.
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That's the main difference. With SpectraLAB you make real time changes to your respons and you don't use a snapshot.
The advantage is that you don't have to work with a predicted respons.
But if the predicted respons is the same as the real respons, there is no issue.
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As they say on those lawyer TV shows, “Asked and answered.” There’s no good reason I can think of to have the start frequency sweep of a sub adjustable. I suppose you have one? End frequency, sure, but start frequency?
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Why would you start at 0 Hz? You can't change the respons, and how accurate is the measurement below 10 Hz? Most of the time the soundcard and mic is not liniair any more.
10 Hz is a better startingpoint if you ask me. (I understand that the software doens't provide this, that's why I asked if it was possible to change the value on a different level like the registry)
Also, a flexible starting point could be handy if you only want to measure the frequencies around the crossover frequency. You don't need a full sweep for that.
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I think this is more of a problem with analog equalizers than digital ones like the BFD we typically use for subs, but I’m admittedly a bit fuzzy on that. JohnM would probably know. In any event, a filter will only change phase at and around the frequency that’s being adjusted, so trying to adjust your sub’s alignment based on that sounds like an exercise in extreme frustration to me. Phase as it relates to equalizer adjustments is one of those subjects where there seems to be more theories and speculations floating around than factual, scientific (read “reproducible”) information.
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I thought that a digital EQ didn't have this issue. But in the review of the Behringer, I saw that the phase does shift. Individual I have a good respons for my fronts and sub, but together there is a small dip. I'll have a look at some other speakerdesign software that I've got, to see if I can get this point clear.
Thanks for you help so far. I'm just giving some feedback, please don't take this in a negative way.
