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My interpolation tutorial has a section of generating interpolation filters using the Remez Exchange algorithm. It starts at about page 39, and has some nice pictures to help illustrate the concept. It's a bit of a different approach from the standard Parks-McClellan approach to Remez, since the tutorial shows the design of an M-band filter rather than a generic lowpass. This puts additional constraints on the filter design, to the point where the Parks-McClellan approximations don't necessarily make sense any more. In other words--it's strictly Remez.