musicdsp.org source code archive - WSInf

,0.860015542499582
};
double b_coefficients[5]=
{0.09056555904993387
,0.3078575723749043
,0.5516782402507934
,0.7652146863779808
,0.95247728378667541
};
filter_a=new CAllPassFilterCascade(a_coefficients,5);
filter_b=new CAllPassFilterCascade(b_coefficients,5);
}
else if (order==8)//rejection=106dB, transition band=0.05
{
double a_coefficients[4]=
{0.03583278843106211
,0.2720401433964576
,0.5720571972357003
,0.827124761997324
};
double b_coefficients[4]=
{0.1340901419430669
,0.4243248712718685
,0.7062921421386394
,0.9415030941737551
};
filter_a=new CAllPassFilterCascade(a_coefficients,4);
filter_b=new CAllPassFilterCascade(b_coefficients,4);
}
else if (order==6)//rejection=80dB, transition band=0.05
{
double a_coefficients[3]=
{0.06029739095712437
,0.4125907203610563
,0.7727156537429234
};
double b_coefficients[3]=
{0.21597144456092948
,0.6043586264658363
,0.9238861386532906
};
filter_a=new CAllPassFilterCascade(a_coefficients,3);
filter_b=new CAllPassFilterCascade(b_coefficients,3);
}
else if (order==4)//rejection=70dB,transition band=0.1
{
double a_coefficients[2]=
{0.07986642623635751
,0.5453536510711322
};
double b_coefficients[2]=
{0.28382934487410993
,0.8344118914807379
};
filter_a=new CAllPassFilterCascade(a_coefficients,2);
filter_b=new CAllPassFilterCascade(b_coefficients,2);
}
else//order=2, rejection=36dB, transition band=0.1
{
double a_coefficients=0.23647102099689224;
double b_coefficients=0.7145421497126001;
filter_a=new CAllPassFilterCascade(&a_coefficients,1);
filter_b=new CAllPassFilterCascade(&b_coefficients,1);
}
}
oldout=0.0;
};
CHalfBandFilter::~CHalfBandFilter()
{
delete filter_a;