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<blockquote data-quote="Jay Barracato" data-source="post: 41311" data-attributes="member: 24">Re: out of band eq filtersI may need to back up a bit in my thinking, and it may be that an all pass filter is better suited to what I am thinking, and my thinking may be totally off becuase I think I am picturing this more in the electronic domain when I do most of my thinking in the acoustic domain (hows that for a sentence; I think it parses).Here is my logic (based on some reading about eq and phase in 6O6&#039;s book):1. Every eq filter has an effect in both the magnitude and phase.2. The narrower the Q on the filter, the steeper the change in phase is at the center point.3. The frequency band over which the phase is effected is wider than the band where the magnitude is affected.So for example, if I were working on a sub/top crossover where I have managed to get the phases close in timing but they still have slightly different slopes, could a eq filter be used to modify the phase of one of the two bands to better match in slope.Or maybe, I should back up a step and ask if anyone can think of an examples where a eq filter might be used because of the change it makes in phase as opposed to magnitude?</blockquote>

[QUOTE="Jay Barracato, post: 41311, member: 24"] Re: out of band eq filters I may need to back up a bit in my thinking, and it may be that an all pass filter is better suited to what I am thinking, and my thinking may be totally off becuase I think I am picturing this more in the electronic domain when I do most of my thinking in the acoustic domain (hows that for a sentence; I think it parses). Here is my logic (based on some reading about eq and phase in 6O6's book): 1. Every eq filter has an effect in both the magnitude and phase. 2. The narrower the Q on the filter, the steeper the change in phase is at the center point. 3. The frequency band over which the phase is effected is wider than the band where the magnitude is affected. So for example, if I were working on a sub/top crossover where I have managed to get the phases close in timing but they still have slightly different slopes, could a eq filter be used to modify the phase of one of the two bands to better match in slope. Or maybe, I should back up a step and ask if anyone can think of an examples where a eq filter might be used because of the change it makes in phase as opposed to magnitude? [/QUOTE]

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