-- Butterworth HPF
-- Sampling Frequency =   44100.0
-- cutoff1 =    3000.0
-- Order = 6th
-- Quantized by 15 [bits]
-- **** 1st biquad ****
    a0_A <= "0000000000000000" when sw0 = '0' else "0011011100110011";
    a1_A <= "0000000000000000" when sw0 = '0' else "1001000110011001";
    a2_A <= "0000000000000000" when sw0 = '0' else "0011011100110011";
    b1_A <= "0000000000000000" when sw0 = '0' else "0110100100110101";
    b2_A <= "0000000000000000" when sw0 = '0' else "1100110001100110";
-- **** 2nd biquad ****
    a0_B <= "0000000000000000" when sw0 = '0' else "0010111101000101";
    a1_B <= "0000000000000000" when sw0 = '0' else "1010000101110101";
    a2_B <= "0000000000000000" when sw0 = '0' else "0010111101000101";
    b1_B <= "0000000000000000" when sw0 = '0' else "0101101000011000";
    b2_B <= "0000000000000000" when sw0 = '0' else "1101110100000010";
-- **** 3rd biquad ****
    a0_C <= "0000000000000000" when sw0 = '0' else "0010101110100110";
    a1_C <= "0000000000000000" when sw0 = '0' else "1010100010110011";
    a2_C <= "0000000000000000" when sw0 = '0' else "0010101110100110";
    b1_C <= "0000000000000000" when sw0 = '0' else "0101001100110001";
    b2_C <= "0000000000000000" when sw0 = '0' else "1110010010010111";