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Don in Portland, OR asks: "What is the difference between additive and subtractive flanging?" On the surface, this seems like a quick and easy question, but there's a lot more to flanging than meets the ear.  This edition of Straight Jive will be pretty in-depth, so if you're looking for a quick answer here it is: "Flanging" is the practice of mixing at least two identical signals, with a small delay applied to one or more of the signals.  This process creates a complex and incredible, albeit sometimes cheesy sound:  the swept comb filter. As their respective names suggest, additive...