// Butterworth BPF
// Sampling Frequency =   44100.0
// cutoff1 =    2000.0
// cutoff2 =    5000.0
// Order = 3rd
// Quantized by 15 [bits]
// **** 1st biquad ****
    assign a0_A = sw0 == 1'b0 ? 16'b0011111111111111 : 16'b0000101101100011;
    assign a1_A = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0000000000000000;
    assign a2_A = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b1111010010011101;
    assign b1_A = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0101011100001110;
    assign b2_A = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b1100111111111010;
// **** 2nd biquad ****
    assign a0_B = sw0 == 1'b0 ? 16'b0011111111111111 : 16'b0000110101101011;
    assign a1_B = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0000000000000000;
    assign a2_B = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b1111001010010101;
    assign b1_B = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0111001010101000;
    assign b2_B = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b1100100000000100;
// **** 3rd biquad ****
    assign a0_C = sw0 == 1'b0 ? 16'b0011111111111111 : 16'b0000101101101011;
    assign a1_C = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0000000000000000;
    assign a2_C = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b1111010010010101;
    assign b1_C = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0101111010000000;
    assign b2_C = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b1101011011011000;