Jouer 2 sons en même temps

uses
MMSystem;

procedure SendMCICommand(Cmd: string);
var
RetVal: Integer;
ErrMsg: array[0..254] of char;
begin
RetVal := mciSendString(PChar(Cmd), nil, 0, 0);
if RetVal <> 0 then
begin
{get message for returned value}
mciGetErrorString(RetVal, ErrMsg, 255);
MessageDlg(StrPas(ErrMsg), mtError, [mbOK], 0);
end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
SendMCICommand('open waveaudio shareable');
SendMCICommand('play "C:xyzBackgroundMusic.wav"');
SendMCICommand('play "C:xyzAnotherMusic.wav"');
SendMCICommand('close waveaudio');
end;