Introduction - If you have any usage issues, please Google them yourself
design LP, HP, B S digital Butterworth and Chebyshev filter. A 'll array has been specified internally. so user only need to input f1, f2, f3, f4, fs (in hz). alpha1. alpha2 (in db) and iband (to specify the type of t o design). This program output hk (z) = bk (z)/ak (z), k = 1,2 ,..., ksection and the freq.
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MDESIIR.C