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In Reply to: RE: No brickwall filter then? posted by Tony Lauck on February 12, 2009 at 13:52:34
:-)
I had always (mistakenly) assumed that upsampling from say 44.1K to 192K didn't really have any big advantage over standard oversampling, but Ted Smith pointed out that it would get rid of the need for a brickwall filter. See below thread ...
Follow Ups:
Ted is usually spot-on with his posts. But the one you linked was wrong. The first stage of the digital filter *has* to have a brickwall filter (or something very close to that).
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