SynthMaker

Need Filter with Steep Roll Off (6-pole and higher)

Archive · 2010 7 old posts

From the original SynthMaker forum (2004–2014), with its members’ names and dates.

mholes1 ·

Was wondering if anybody could post or knew where i could find a low and highpass filter with very steep roll off at the cut-off frequencies, I'd say I'd need at filters of 6-pole or higher, the modules that come within SM seem to have a more gentle curve to their filter graphs.Thanks!

mikey

MichaelBenjamin ·

you could chain a 2 and 4 pole and then try out different cutoff and resonance settings.

mholes1 ·

great that worked perfectly! when chaining many filters though as the roll off got steeper the resonance naturally got larger and larger, any way to counteract this?

MichaelBenjamin ·

maybe at the end of the chain a peaking eq that lowers gain at resonance freqency.

nix ·

Would this result in an elliptic filter if the settings were right? There is a chebyshev here somewhere

MegaHurtz ·

More db`s equal more "resonance" only here it`s called Q . Most of the filters are on the knife edge of a good frequency responce. For a filter that can be tweaked outside that balance you can try a biquad. But these also start ringing.. It`s a natural phenomena.

AngularMomentum ·

Here is a solution for the Q range.

[old link]

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