Butterworth Low Pass filter Implementation

I believe we put you on the hard bumpy track

Anand's response on behalf of Intel is too empty for such responsibility but thanks anyway for contributing

FvM has shrouded it with too much complexity. After all multi rate approach will require its own filter or chain of filters.

Away from butterworth or no butterworth you better define your filtering requirement in terms of cutoff frequency, attenuation in dB ...etc. You want a proper filter rather specifically butterworth type.