Re: Using butterworth filter

[StandardOctaveUser]

Ofcourse what kind of filter 
you require is dependent on 
your specific application. 
(type and high pass low pass
or band pass etc.)

Ie. butterworth is generally 
preferred where pass and stop
band quality is more important
than transition sharpness. 

Think of this as your 
eyeglasses, do you need to 
see far away or close or say
is ribbles in pass or stop band
ie. astigmatism is important 
for that application or not.

You can get an idea for what 
kind of filter is suited to the 
specific application from;

https://en.wikipedia.org/wiki/Linear_filter#IIR_transfer_functions

Take a look at the paragraph 
under the picture in that section.




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