Using C,C++ for filter design

[akipro]

Hey I've got this project where I have to design a filter for a speaker. But this has to be done in C or C++ and then I've got to test it using the same. I have to use some suitable algorithm for it which is known at paper level.

Does anyone have any idea how is this carried out, specially designing the test bench for the filter.

Thanks.

 

[Dan Mills]

There are a couple of standard methods for designing digital filters, google key prases to get you started "Remez exchange" "Parks–McClellan" "Direct form II".

To test, produce a chirp, feed it through the filter, plot the amplitude vs time, or feed it noise and take an FFT of the output, lots of easy to skin this.

There is a ton of open source code out there dealing with digital filters, you might find the "Music DSP archives" to be worth exploring.

73 Dan.

 

[akipro]

hey i already have my algorithm, what i need to know is how to implement and specially test it in C,C++ ???