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Originally Posted by acreil  Multiple parallel loops seem to "fight against each other" a lot more. Tuning a single loop algorithm feels more like "enhancing and improving" rather than "making it less obviously bad". |
The thing that is nice about a single loop is that the output taps will always have the same relationship to each other. Make those sound nice, and you're in business. The allpasses within the loop can be viewed as adding phase randomization to the loop, although they can also cause artifacts if not tuned properly.
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I wonder if the constant density parallel comb filter case can be improved by using fewer combs and adding more output taps per delay... I suspect it's really only trading one problem for another...
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I look at each comb as a wheel, and the taps as spokes. You have wheels rotating at different rates, and they are on top of each other. Each time the spokes of one or more wheels are at the same place, an unpleasant resonance is formed. So...is it easier to reduce the overlap with a bunch of wheels with less spokes, or less wheels and more spokes?