I want to use dsp::FilterDesign class for a lowpass filter with a 96 dB/octave slope. If the first-order filter corresponds to -6 dB/octave slope, does that mean that by making it a 10th-order filter, I would have a -60 dB/octave filter?
dsp::FilterDesign< FloatType >::designIIRLowpassHighOrderButterworthMethod ( FloatType frequency,
double sampleRate,
int order )