mohler@drune.UUCP (MohlerDS) (08/19/85)
I am afraid that in my hurry to reply briefly (in my previous reply) that I made my opinion clear as mud! Clearly jj, if you want to talk about text book filters or laboratory optimized filters you are right! My whole point between analog and digital filters is that when you consider the realities of a consumer electronic product like a CD player the higher the order of the filter - the cheaper or easier it is to do this filter digitally! It is more likely that a digital high order filter will produce the proper filter action when the tollerances of a high order analog filter are considered. One line in my previous reply should have said unless cost and space and power are not a criteria if you feed a 1KHZ square wave into both a digital and an analog filter the odds of the digital filter doing a better job increase dramatically as the order of the filter increases, and that if the analog filter is doing as good a job that the analog filter is very expensive and produced with incredible tollerances. I don't think we have a fundamental disagreement, I think my posting was inadequately clear on my point - sorry about that!