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At 07:24 AM 8/26/2001, M. Steven Ginn wrote: >What is actual definition and purpose of "Feedback" and why would you >want to control it? I think others answered for you what feedback is. If you want to learn more, there are a lot of articles about this topic on the Looper's Delight site. For example, the EDP FAQ has a whole section devoted to feedback questions, including the essential "Understanding Feedback and What It's Good For": http://www.loopers-delight.com/tools/echoplex/FAQ8.html there are also explanations of the feedback implementation on the echoplex, of course. Matthias also wrote a bit about Feedback in the "tips from LD" page in the tips and tricks section: http://www.loopers-delight.com/tips/Tips_fromLD.html I'm not going to rewrite here what I wrote for the FAQ linked above, but in my opinion feedback control is one of the most essential techniques in performance oriented looping. It's one of the things that makes a serious looper into a real musical instrument, because it gives you such an organic and musical control over the development and evolution of your loops. Feedback is one of the key things separating loopers from being a variation of a recording studio, or from the very static sort of loops that come from simply triggering a sampler. In those devices the loops just operate in parallel to you, but you are not musically involved in their content in real-time. Feedback (and it's complement, overdub) allows you to be musically involved in your loops, creating, evolving, manipulating, deconstructing. Learning to use Feedback is one of the key things that takes you past the beginner stage of looping, the stage where all you do is record some basic loop and let it repeat forever as a backing track while you play over it. Overdub is the next step, where you can build and add to your loops. But you quickly run into the problem there where you loops only grow. You get what I think of as the "fish trap" effect of looping, where stuff only goes into the loops but never comes out again. Eventually you just have a cluttered mess, and your only option is to kill it and start something new. Feedback is what you need to reduce the loop and allows you to make smooth transitions to something new. To me, the number one most serious flaw in a number of recent loopers has been the lack of a feedback control on the loops. The Boss RC-20 and the Line6 DL4 are guilty of this. They have overdub, but no feedback control!! So all you can do is add to your loop and grow it bigger, but you can never reduce it. You can't evolve to somewhere new. It's painfully obvious (and to me, irritating) when I see people performing with these devices. They either stick with something simple in the loop that stays on way too long (because they have no way to really evolve it), or they build the loop up too much until it is really busy and crowded and then they can't go anywhere with it. The music tends to become really static and not move anywhere. kim ______________________________________________________________________ Kim Flint | Looper's Delight kflint@loopers-delight.com | http://www.loopers-delight.com