unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes,
  Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls,
  SpeechLib_TLB;

type
  TForm1 = class(TForm)
    Edit1: TEdit;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
  private
    { Private declarations }
    procedure PlaywavByStrs(pvWavStr: string; SVSFlagsAsync: Integer);
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  fVoce: ISpeechVoice;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  PlaywavByStrs(Edit1.Text, 0);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  fVoce := CoSpVoice.Create;
  fVoce.Resume;
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  fVoce._Release;
end;

procedure TForm1.PlaywavByStrs(pvWavStr: string; SVSFlagsAsync: Integer);
begin
  if fVoce.Status.RunningState = SRSEDone then
    fVoce.Speak(pvWavStr, SVSFlagsAsync);
end;

end.