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To: S100 who wrote (13908)	7/17/2001 6:58:09 PM
From: 49thMIMOMander	Respond to of 34857

It is difficult using even-numbered filters in both Matlab and in simple system simulations. One believes on loses that phase linearity by half a sample, too difficult for a first grader. Ilmarinen If I remember correctly Matlab couldn't even handle even length Remez filters, additionally the bessel functions and the grid were so lousily implemented that the otherwise extremely robust system didn't even converge.. for 128 tap filters... (minor, old advice, one need to double the iterative loops for the bessel function, also quadruple the the density of the grid, use double floating point, and additionally safeguard for the added accuracy which the then $60 Cyrix math processor provided, which turned out to crash because it wasn't as inaccurate as the Intel one, for $500) Btw, the best margin ever on any piece of consumer sillycone, at least if considering volume.