wire [15:0] a0_A, a1_A, a2_A, b1_A, b2_A;
	wire [15:0] a0_B, a1_B, a2_B, b1_B, b2_B;
	wire [15:0] a0_C, a1_C, a2_C, b1_C, b2_C;

	wire [15:0] RDATAOUT_A, RDATAOUT_B;

// Butterworth LPF
// Sampling Frequency =   44100.0
// cutoff1 =    3000.0
// Order = 6th
// Quantized by 15 [bits]
// **** 1st biquad ****
    assign a0_A = sw0 == 1'b0 ? 16'b0011111111111111 : 16'b0000001010011010;
    assign a1_A = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0000010100110100;
    assign a2_A = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0000001010011010;
    assign b1_A = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0110100100101111;
    assign b2_A = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b1100110001101001;
// **** 2nd biquad ****
    assign a0_B = sw0 == 1'b0 ? 16'b0011111111111111 : 16'b0000001000111010;
    assign a1_B = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0000010001110100;
    assign a2_B = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0000001000111010;
    assign b1_B = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0101101000010000;
    assign b2_B = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b1101110100000110;
// **** 3rd biquad ****
    assign a0_C = sw0 == 1'b0 ? 16'b0011111111111111 : 16'b0000001000001110;
    assign a1_C = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0000010000011101;
    assign a2_C = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0000001000001110;
    assign b1_C = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b0101001100101010;
    assign b2_C = sw0 == 1'b0 ? 16'b0000000000000000 : 16'b1110010010011100;

	MuxIir MuxIir_A(
		.RST_N(RST_N),
		.MCLK(CLK),
		.FSCLK(LRCLK_dly),
		.A0(a0_A),
		.A1(a1_A),
		.A2(a2_A),
		.B1(b1_A),
		.B2(b2_A),
		.XIN(RDATAIN),
		.YOUT(RDATAOUT_A)
	);

	MuxIir MuxIir_B(
		.RST_N(RST_N),
		.MCLK(CLK),
		.FSCLK(LRCLK_dly),
		.A0(a0_B),
		.A1(a1_B),
		.A2(a2_B),
		.B1(b1_B),
		.B2(b2_B),
		.XIN(RDATAOUT_A),
		.YOUT(RDATAOUT_B)
	);

	MuxIir MuxIir_C(
		.RST_N(RST_N),
		.MCLK(CLK),
		.FSCLK(LRCLK_dly),
		.A0(a0_C),
		.A1(a1_C),
		.A2(a2_C),
		.B1(b1_C),
		.B2(b2_C),
		.XIN(RDATAOUT_B),
		.YOUT(RDATAOUT)
	);