module onda_exemplo(
	bot1,
	bot2,
	bot3,
	bot4,
	chav1,
	chav2,
	endereco_audio,
	taxa_amostragem,
	incremento_audio,
	largura_endereco,
	Sin_Out,
	clock
);

/////////////////////////////////////
input clock;
input bot1;
input bot2;
input bot3;
input bot4;
input chav1;
input chav2;
input [8:0] endereco_audio;
output [16:0] taxa_amostragem;
output [4:0] incremento_audio;
output [8:0] largura_endereco;
output reg [15:0] Sin_Out;

/////////////////////////////////////
reg [50:0] cont;
reg [3:0] nota;
reg [4:0]incremento;
reg [4:0]volctrl;
reg [12:0]frequencia;

/////////////////////////////////////
parameter taxa = 32000;

/////////////////////////////////////
assign taxa_amostragem = taxa;
assign incremento_audio = incremento;
assign largura_endereco = taxa_amostragem / frequencia;

/////////////////////////////////////
always @(posedge clock)

begin

	if(chav2) begin
		nota = 0;
	end
		else if(!chav1) begin
			if(!bot1)
				nota = 1;
			else if(!bot2)
				nota = 2;
			else if(!bot3)
				nota = 3;
			else if(!bot4)
				nota = 4;
			else
				nota = 0;
		end
		else begin
			if(!bot1)
				nota = 5;
			else if(!bot2)
				nota = 6;
			else if(!bot3)
				nota = 7;
			else if(!bot4)
				nota = 8;
			else
				nota = 0;
		end

end
/////////////////////////////////////
always @(endereco_audio)
begin
		if(nota == 0)
			Sin_Out		<=		0		;// 3d
		else if(nota == 1) begin
			incremento = 1;
			frequencia = 294 * incremento; // 3d
				case(endereco_audio)//signal frequency = 294, sampling rate = 32000, number of points = 108
						0  : Sin_Out   <=   16'b0000000000000000;
						1  : Sin_Out   <=   16'b0000011110000011;
						2  : Sin_Out   <=   16'b0000111011111111;
						3  : Sin_Out   <=   16'b0001011001101110;
						4  : Sin_Out   <=   16'b0001110111001010;
						5  : Sin_Out   <=   16'b0010010100001011;
						6  : Sin_Out   <=   16'b0010110000101011;
						7  : Sin_Out   <=   16'b0011001100100101;
						8  : Sin_Out   <=   16'b0011100111110001;
						9  : Sin_Out   <=   16'b0100000010001010;
						10  : Sin_Out   <=   16'b0100011011101010;
						11  : Sin_Out   <=   16'b0100110100001100;
						12  : Sin_Out   <=   16'b0101001011101010;
						13  : Sin_Out   <=   16'b0101100001111110;
						14  : Sin_Out   <=   16'b0101110111000101;
						15  : Sin_Out   <=   16'b0110001010111000;
						16  : Sin_Out   <=   16'b0110011101010101;
						17  : Sin_Out   <=   16'b0110101110010110;
						18  : Sin_Out   <=   16'b0110111101111000;
						19  : Sin_Out   <=   16'b0111001011111000;
						20  : Sin_Out   <=   16'b0111011000010011;
						21  : Sin_Out   <=   16'b0111100011000101;
						22  : Sin_Out   <=   16'b0111101100001101;
						23  : Sin_Out   <=   16'b0111110011101000;
						24  : Sin_Out   <=   16'b0111111001010101;
						25  : Sin_Out   <=   16'b0111111101010011;
						26  : Sin_Out   <=   16'b0111111111100000;
						27  : Sin_Out   <=   16'b0111111111111100;
						28  : Sin_Out   <=   16'b0111111110100111;
						29  : Sin_Out   <=   16'b0111111011100010;
						30  : Sin_Out   <=   16'b0111110110101101;
						31  : Sin_Out   <=   16'b0111110000001000;
						32  : Sin_Out   <=   16'b0111100111110111;
						33  : Sin_Out   <=   16'b0111011101111001;
						34  : Sin_Out   <=   16'b0111010010010011;
						35  : Sin_Out   <=   16'b0111000101000101;
						36  : Sin_Out   <=   16'b0110110110010011;
						37  : Sin_Out   <=   16'b0110100110000001;
						38  : Sin_Out   <=   16'b0110010100010010;
						39  : Sin_Out   <=   16'b0110000001001001;
						40  : Sin_Out   <=   16'b0101101100101011;
						41  : Sin_Out   <=   16'b0101010110111101;
						42  : Sin_Out   <=   16'b0101000000000100;
						43  : Sin_Out   <=   16'b0100101000000011;
						44  : Sin_Out   <=   16'b0100001111000010;
						45  : Sin_Out   <=   16'b0011110101000100;
						46  : Sin_Out   <=   16'b0011011010010001;
						47  : Sin_Out   <=   16'b0010111110101101;
						48  : Sin_Out   <=   16'b0010100010011111;
						49  : Sin_Out   <=   16'b0010000101101110;
						50  : Sin_Out   <=   16'b0001101000011111;
						51  : Sin_Out   <=   16'b0001001010111001;
						52  : Sin_Out   <=   16'b0000101101000010;
						53  : Sin_Out   <=   16'b0000001111000001;
						54  : Sin_Out   <=   16'b1111110000111111;
						55  : Sin_Out   <=   16'b1111010010111110;
						56  : Sin_Out   <=   16'b1110110101000111;
						57  : Sin_Out   <=   16'b1110010111100001;
						58  : Sin_Out   <=   16'b1101111010010010;
						59  : Sin_Out   <=   16'b1101011101100001;
						60  : Sin_Out   <=   16'b1101000001010011;
						61  : Sin_Out   <=   16'b1100100101101111;
						62  : Sin_Out   <=   16'b1100001010111100;
						63  : Sin_Out   <=   16'b1011110000111110;
						64  : Sin_Out   <=   16'b1011010111111101;
						65  : Sin_Out   <=   16'b1010111111111100;
						66  : Sin_Out   <=   16'b1010101001000011;
						67  : Sin_Out   <=   16'b1010010011010101;
						68  : Sin_Out   <=   16'b1001111110110111;
						69  : Sin_Out   <=   16'b1001101011101110;
						70  : Sin_Out   <=   16'b1001011001111111;
						71  : Sin_Out   <=   16'b1001001001101101;
						72  : Sin_Out   <=   16'b1000111010111011;
						73  : Sin_Out   <=   16'b1000101101101101;
						74  : Sin_Out   <=   16'b1000100010000111;
						75  : Sin_Out   <=   16'b1000011000001001;
						76  : Sin_Out   <=   16'b1000001111111000;
						77  : Sin_Out   <=   16'b1000001001010011;
						78  : Sin_Out   <=   16'b1000000100011110;
						79  : Sin_Out   <=   16'b1000000001011001;
						80  : Sin_Out   <=   16'b1000000000000100;
						81  : Sin_Out   <=   16'b1000000000100000;
						82  : Sin_Out   <=   16'b1000000010101101;
						83  : Sin_Out   <=   16'b1000000110101011;
						84  : Sin_Out   <=   16'b1000001100011000;
						85  : Sin_Out   <=   16'b1000010011110011;
						86  : Sin_Out   <=   16'b1000011100111011;
						87  : Sin_Out   <=   16'b1000100111101101;
						88  : Sin_Out   <=   16'b1000110100001000;
						89  : Sin_Out   <=   16'b1001000010001000;
						90  : Sin_Out   <=   16'b1001010001101010;
						91  : Sin_Out   <=   16'b1001100010101011;
						92  : Sin_Out   <=   16'b1001110101001000;
						93  : Sin_Out   <=   16'b1010001000111011;
						94  : Sin_Out   <=   16'b1010011110000010;
						95  : Sin_Out   <=   16'b1010110100010110;
						96  : Sin_Out   <=   16'b1011001011110100;
						97  : Sin_Out   <=   16'b1011100100010110;
						98  : Sin_Out   <=   16'b1011111101110110;
						99  : Sin_Out   <=   16'b1100011000001111;
						100  : Sin_Out   <=   16'b1100110011011011;
						101  : Sin_Out   <=   16'b1101001111010101;
						102  : Sin_Out   <=   16'b1101101011110101;
						103  : Sin_Out   <=   16'b1110001000110110;
						104  : Sin_Out   <=   16'b1110100110010010;
						105  : Sin_Out   <=   16'b1111000100000001;
						106  : Sin_Out   <=   16'b1111100001111101;
						107  : Sin_Out   <=   16'b0000000000000000;
			default	:
					Sin_Out		<=		0		;
			endcase
		end
	end
endmodule