问题来源: http://www.cnblogs.com/del/archive/2008/10/25/1069523.html#1351197

unit Unit1;interfaceusesWindows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,Dialogs, StdCtrls;typeTForm1 = class(TForm)Button1: TButton;Button2: TButton;procedure FormCreate(Sender: TObject);procedure FormDestroy(Sender: TObject);procedure Button1Click(Sender: TObject);procedure Button2Click(Sender: TObject);end;varForm1: TForm1;implementation{$R *.dfm}uses MMSystem;{合并两个 Wav 文件流的函数}
function ConWavStream(AWavStream1, AWavStream2: TStream; var ANewStream: TStream): Boolean;
typeTWavFormat = packed recordChunkID: array[0..3] of AnsiChar;     {'RIFF'}ChunkSize: Longword;                  {size-8}Format: array[0..3] of AnsiChar;      {'WAVE'}SubChunk1ID: array[0..3] of AnsiChar; {'fmt '}SubChunk1Size: Longword;              {hex10}AudioFormat: Word;                    {hex 01}NumOfChannels: Word;                  {1 mono, 2 stereo}SampleRate: Longword;                 {number of samples/sec}ByteRate: Longword;                   {samplerate* num of channels*bytes per (mono) sample}BytesperSample: Word;                 {size of (mono) sample}BitsPerSample: Word;                  {BytesperSample *8}SubChunk2ID: array[0..3] of AnsiChar; {'data'}SubChunk2Size: Longword;              {number of data bytes}end;
varvWavFormat1: TWavFormat;vWavFormat2: TWavFormat;vChunkSize1, vChunkSize2: Integer;
beginResult := False;if AWavStream1.Read(vWavFormat1, SizeOf(TWavFormat)) <> SizeOf(TWavFormat) then Exit;if AWavStream2.Read(vWavFormat2, SizeOf(TWavFormat)) <> SizeOf(TWavFormat) then Exit;if vWavFormat1.ChunkID <> 'RIFF' then Exit;if vWavFormat1.SubChunk2ID <> 'data' then Exit;vChunkSize1 := vWavFormat1.SubChunk2Size;vChunkSize2 := vWavFormat2.SubChunk2Size;vWavFormat1.ChunkSize := 0;vWavFormat1.SubChunk2Size := 0;vWavFormat2.ChunkSize := 0;vWavFormat2.SubChunk2Size := 0;if not CompareMem(@vWavFormat1, @vWavFormat2, SizeOf(TWavFormat)) then Exit; {格式不同}vWavFormat1.ChunkSize := vChunkSize1 + vChunkSize2 + SizeOf(vWavFormat1) - 8;vWavFormat1.SubChunk2Size := vChunkSize1 + vChunkSize2;ANewStream.Write(vWavFormat1, SizeOf(TWavFormat));ANewStream.CopyFrom(AWavStream1, vChunkSize1);ANewStream.CopyFrom(AWavStream2, vChunkSize2);Result := True;
end; { ConWavStream End}varWavStream: TStream;{合并两个资源流; 之前要在资源中分别加载两个 WAV 文件, 并分别命名: wav1、wav2}
procedure TForm1.FormCreate(Sender: TObject);
varrs1,rs2: TResourceStream;
beginrs1 := TResourceStream.Create(HInstance, 'wav1', RT_RCDATA);rs2 := TResourceStream.Create(HInstance, 'wav2', RT_RCDATA);WavStream := TMemoryStream.Create;ConWavStream(rs1, rs2, WavStream);rs1.Free;rs2.Free;
end;procedure TForm1.FormDestroy(Sender: TObject);
beginWavStream.Free;
end;{循环播放}
procedure TForm1.Button1Click(Sender: TObject);
beginsndPlaySound(TMemoryStream(WavStream).Memory, SND_ASYNC or SND_MEMORY or SND_LOOP);
end;{暂停}
procedure TForm1.Button2Click(Sender: TObject);
beginsndPlaySound(nil, 0);
end;end.