Looks like Roger has his tracking quite nicely. I have never had the opportunity to play with the dot com filter. But, I sure do like this one. :) Larry ----- Original Message ----- From: <konkuro@...> Very interesting. Thanks for the detailed info, as I have been curious. I just stuck a frequency counter on my Synthesizers.com Q150 ladder LPF after reading your reply. The results were: 220 440 882 1755 3456 Like your filter, this one can be tweaked (though not internally) for greater accuracy in particular ranges. It does have a nice sweet sine. Interesting to compare. johnm
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Re: [motm] Re: 490 filter
2003-01-11 by J. Larry Hendry