Запись с помощью MediaPlayer

function CreateNewWave(NewFileName: string): Boolean;
var
  DeviceID: Word;
  Return: LongInt;
  MciOpen: TMCI_Open_Parms;
  MciRecord: TMCI_Record_Parms;
  MciPlay: TMCI_Play_Parms;
  MciSave: TMCI_SaveParms;
  MCIResult: LongInt;
  Flags: Word;
  TempFileName: array[0..255] of char;
begin
  MediaPlayer.Close;
  try
    StrPCopy(TempFileName, NewFilename);

    MciOpen.lpstrDeviceType := 'waveaudio';
    MciOpen.lpstrElementName := '';
    Flags := Mci_Open_Element or Mci_Open_Type;
    MCIResult := MciSendCommand(0, MCI_OPEN, Flags, LongInt(@MciOpen));
    DeviceID := MciOpen.wDeviceId;

    MciRecord.dwTo := 1;
    Flags := Mci_To or Mci_Wait;
    MCIResult := MciSendCommand(DeviceID, Mci_Record, Flags,
      LongInt(@MciRecord));

    mciPlay.dwFrom := 0;
    Flags := Mci_From or Mci_Wait;
    MciSendCommand(DeviceId, Mci_Play, Flags, LongInt(@MciPlay));

    mciSave.lpfileName := TempFilename.CString;
    Flags := MCI_Save_File or Mci_Wait;
    MCIResult := MciSendCommand(DeviceID, MCI_Save, Flags, LongInt(@MciSave));

    Result := MciSendCommand(DeviceID, Mci_Close, 0, LongInt(nil)) = 0;
  end;
end;