iir_54.h

// DD4WH LPF DC - 5.4 kHz
// (sampling rate 44.117 kHz)
// 12.2.2015
// Parameters generated using Iowa Hills IIR Filter Designer
// 8th order inv Cheby Lowpass (4-stage cascaded biquad)
// 
// 

//const uint16_t IIR_44_numStages = 6;
// coefficients must be in order: B0, B1, B2, A1, A2
// unlike output by Iowa Hils IIR Filter Designer !

const double IIR_54_Coeffs_0[] =
{ 
   0.455538551190282137,
   -0.414177993916487353,
   0.455538551190282137,
   -0.610743068556704460,
   0.107642177020781438
};

const double IIR_54_Coeffs_1[] =
{ 
   0.353406693953235374,
   -0.222163021852471249,
   0.353406693953235374,
   -0.777493307668655653,
   0.262143673722655013
};

const double IIR_54_Coeffs_2[] =
{ 
   0.223479292310269140,
   0.034735385615843543,
   0.223479292310269140,
   -1.028293644763743850,
   0.509987615000125571
};

const double IIR_54_Coeffs_3[] =
{
   0.142940195575829515,
   0.231304531888519099,
   0.142940195575829515,
   -1.298067623920669660,
   0.815252546960847924
};