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<blockquote data-quote="Jay Barracato" data-source="post: 25091" data-attributes="member: 24">Re: Congos... What your favorite mic?Not that I would consider Sweetwater&#039;s stuff to be definitive on anything, but I think the question is WHY does changing the distance minimize phase cancellation. Any time two signals are combined you need to consider both level and timing. The rule can&#039;t simply be based on arrival timing because no matter what distance you choose, some frequencies will cancel. Instead my understanding, based on Bob McCarthy&#039;s book, is that a large enough SPL difference in the signals being combined reduces how noticeable the cancellation is. Moving the second mic three times further from the source reduces the signal from the source enough that when combined with the first signal the cancellation is not as significant.&nbsp;Of course I may be due for a reread of that section of Bob&#039;s book, but I think that is a better explanation of WHY the rule works. What the Sweetwater note addresses is the result of applying the rule, not an explanation of why the rule works.</blockquote>

[QUOTE="Jay Barracato, post: 25091, member: 24"] Re: Congos... What your favorite mic? Not that I would consider Sweetwater's stuff to be definitive on anything, but I think the question is WHY does changing the distance minimize phase cancellation. Any time two signals are combined you need to consider both level and timing. The rule can't simply be based on arrival timing because no matter what distance you choose, some frequencies will cancel. Instead my understanding, based on Bob McCarthy's book, is that a large enough SPL difference in the signals being combined reduces how noticeable the cancellation is. Moving the second mic three times further from the source reduces the signal from the source enough that when combined with the first signal the cancellation is not as significant. Of course I may be due for a reread of that section of Bob's book, but I think that is a better explanation of WHY the rule works. What the Sweetwater note addresses is the result of applying the rule, not an explanation of why the rule works. [/QUOTE]

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