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Re: low-pass and high-pass filter.
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Re: low-pass and high-pass filter.

  • Subject: Re: low-pass and high-pass filter.
  • From: Nigel Redmon <email@hidden>
  • Date: Fri, 23 Dec 2016 21:32:37 +0700
Maybe this will help? Use four biquads, each set to the same frequency, but with Q set as indicated by the calculator:

http://www.earlevel.com/main/2016/09/29/cascading-filters/

Nigel

On Dec 23, 2016, at 8:59 PM, Waverly Edwards <email@hidden> wrote:

I need to apply an eight-pole Butterworth low-pass and later a high-pass filter.  Are there any built-in mechanisms for this?

If there are not, would someone mind providing some algorithmic guidance as to how this could  accomplished?  Why?  I am attempting to reproduce an experiment in which an eight-pole Butterworth filter was used -- a high-pass at 300Hz and a low-pass at 3000Hz. If it matters, this is not for iOS.

 

Thank you kindly,

 

 

W.

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References: 
 >low-pass and high-pass filter. (From: Waverly Edwards <email@hidden>)

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