public GrammarBuilder GetGrammar_Custom(string grammar)
        {
            Choices globalChoices = new Choices();
            string[] sentences = grammar.Split('|');
            foreach (string s in sentences)
            {
                GrammarBuilder sentenceBuilder = new GrammarBuilder();
                string[] words = s.Split(' ');
                foreach (string w in words)
                {
                    if (m_vocabulories.ContainsKey(w))
                        sentenceBuilder.Append(new Choices(m_vocabulories[w].ToArray()));
                    else if (w == "#Dictation")
                        sentenceBuilder.AppendDictation();
                    else if (w == "#WildCard")
                        sentenceBuilder.AppendWildcard();
                    else if (w != "")
                        sentenceBuilder.Append(w);
                }
                globalChoices.Add(sentenceBuilder);
            }

            GrammarBuilder globalBuilder = new GrammarBuilder(globalChoices);
            globalBuilder.Culture = m_culture;
            Console.WriteLine(globalBuilder.DebugShowPhrases);
            return globalBuilder;
        }

        public Grammar BuildGrammar()
        {
            Choices choiceBuilder = new Choices();

            // Songs
            if (SongHelper.SongCount() > 0) // it freaks out if there's nothing in the one-of bit.
            {
                GrammarBuilder songBuilder = new GrammarBuilder();
                songBuilder.Append("play song");
                songBuilder.Append(SongHelper.GenerateSongChoices());
                choiceBuilder.Add(songBuilder);
            }

            GrammarBuilder shuffleBuilder = new GrammarBuilder();
            shuffleBuilder.Append("shuffle all songs");
            choiceBuilder.Add(shuffleBuilder);

            // Playlists
            if (SongHelper.PlaylistCount() > 0)
            {
                GrammarBuilder playListBuilder = new GrammarBuilder();
                playListBuilder.Append("play playlist");
                playListBuilder.Append(SongHelper.GeneratePlaylistChoices());
                choiceBuilder.Add(playListBuilder);

                GrammarBuilder shufflePlayListBuilder = new GrammarBuilder();
                shufflePlayListBuilder.Append("shuffle playlist");
                shufflePlayListBuilder.Append(SongHelper.GeneratePlaylistChoices());
                choiceBuilder.Add(shufflePlayListBuilder);
            }

            Grammar gram = new Grammar(new GrammarBuilder(choiceBuilder));

            return gram;
        }

        public Main()
        {
            InitializeComponent();

            fontList.SelectedIndex = 0;
            squareCenter = squareButton.Checked;

            speechEngine.SpeechRecognized +=new EventHandler<SpeechRecognizedEventArgs>(speechEngine_SpeechRecognized);

            speechEngine.SetInputToDefaultAudioDevice();

            Choices choices = new Choices("primes", "squares", "dots", "numbers");

            foreach(string item in fontList.Items)
                choices.Add("set font " + item);

            for (int i = 0; i <= 999; ++i)
                choices.Add("set size " + i);

            GrammarBuilder grammarBuilder = new GrammarBuilder(choices);
            speechEngine.LoadGrammar(new Grammar(grammarBuilder));
            speechEngine.RecognizeAsync(RecognizeMode.Multiple);

            init();
        }

        private void btnRecognize_Click(object sender, RoutedEventArgs e)
        {
            text = txtInput.Text.ToLower();
            text = CleanText(text);
            words = text.Split(' ');
            wcount = words.Length;
            //words = words.Distinct().ToArray();

            txtOutput.Text = text;

            Choices choices = new Choices(words);

            GrammarBuilder gb = new GrammarBuilder(new GrammarBuilder(choices), 0, wcount);
            //GrammarBuilder gb = new GrammarBuilder(txtInput.Text.Trim());
            gb.Culture = new CultureInfo("es-MX");

            Grammar grammar = new Grammar(gb);

            //recognizer = new SpeechRecognitionEngine("SR_MS_es-MX_TELE_11.0");
            //recognizer = new SpeechRecognitionEngine(new CultureInfo("es-MX"));
            recognizer.LoadGrammar(grammar);

            recognizer.SetInputToWaveFile(@"E:\Proyectos\Audio Timestamps\chapter01.wav");
            //recognizer.SetInputToDefaultAudioDevice();

            recognizer.RecognizeCompleted += new EventHandler<RecognizeCompletedEventArgs>(RecognizeCompletedHandler);

            recognizer.RecognizeAsync(RecognizeMode.Multiple);
        }

void BuildSpeechEngine(RecognizerInfo rec)
{
    _speechEngine = new SpeechRecognitionEngine(rec.Id);

    var choices = new Choices();
    choices.Add("venus");
    choices.Add("mars");
    choices.Add("earth");
    choices.Add("jupiter");
    choices.Add("sun");

    var gb = new GrammarBuilder { Culture = rec.Culture };
    gb.Append(choices);

    var g = new Grammar(gb);

    _speechEngine.LoadGrammar(g);
    //recognized a word or words that may be a component of multiple complete phrases in a grammar.
    _speechEngine.SpeechHypothesized += new EventHandler<SpeechHypothesizedEventArgs>(SpeechEngineSpeechHypothesized);
    //receives input that matches any of its loaded and enabled Grammar objects.
    _speechEngine.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(_speechEngineSpeechRecognized);
    //receives input that does not match any of its loaded and enabled Grammar objects.
    _speechEngine.SpeechRecognitionRejected += new EventHandler<SpeechRecognitionRejectedEventArgs>(_speechEngineSpeechRecognitionRejected);


    //C# threads are MTA by default and calling RecognizeAsync in the same thread will cause an COM exception.
    var t = new Thread(StartAudioStream);
    t.Start();
}

        private Grammar BrightnessGrammar()
        {
            // Change/Set Brightness to Choices
            var choices = new Choices();
            for (var i = -255; i <= 255; i++)
            {
                SemanticResultValue choiceResultValue = new SemanticResultValue(i.ToString(), i);
                GrammarBuilder resultValueBuilder = new GrammarBuilder(choiceResultValue);
                choices.Add(resultValueBuilder);
            }

            GrammarBuilder changeGrammar = "Change";
            GrammarBuilder setGrammar = "Set";
            GrammarBuilder brightnessGrammar = "Brightness";
            GrammarBuilder toGrammar = "To";

            SemanticResultKey resultKey = new SemanticResultKey("brightness", choices);
            GrammarBuilder resultContrast = new GrammarBuilder(resultKey);

            Choices alternatives = new Choices(changeGrammar, setGrammar);

            GrammarBuilder result = new GrammarBuilder(alternatives);
            result.Append(brightnessGrammar);
            result.Append(toGrammar);
            result.Append(resultContrast);

            Grammar grammar = new Grammar(result);
            grammar.Name = "Set Brightness";
            return grammar;
        }

        public Grammar BuildGrammar()
        {
            Choices choiceBuilder = new Choices();

            // Next
            GrammarBuilder nextBuilder = new GrammarBuilder();
            nextBuilder.Append(new Choices("next song", "play the next song", "skip this song", "play next song"));
            choiceBuilder.Add(nextBuilder);

            // Previous
            GrammarBuilder prevBuilder = new GrammarBuilder();
            prevBuilder.Append(new Choices("last song", "previous song", "play the last song", "play the previous song"));
            choiceBuilder.Add(prevBuilder);

            // Pause
            GrammarBuilder pauseBuilder = new GrammarBuilder();
            pauseBuilder.Append(new Choices("pause song", "pause this song", "pause song playback"));
            choiceBuilder.Add(pauseBuilder);

            // Stop
            GrammarBuilder stopBuilder = new GrammarBuilder();
            stopBuilder.Append(new Choices("stop song", "stop song playback", "stop the music"));
            choiceBuilder.Add(stopBuilder);

            // Resume
            GrammarBuilder resumeBuilder = new GrammarBuilder();
            resumeBuilder.Append(new Choices("resume playback", "resume song", "resume playing"));
            choiceBuilder.Add(resumeBuilder);

            return new Grammar(new GrammarBuilder(choiceBuilder));
        }

        public IntroGrammar()
        {
            Choices majors = new Choices();
             majors.Add(new SemanticResultValue("Computer Science", "CSC"));

             SemanticResultKey majorKey = new SemanticResultKey(Slots.Major.ToString(), majors);

             Choices years = new Choices();
             for (int i = 2001; i < 2020; i++)
             {
            years.Add(new SemanticResultValue(i.ToString(), i));
             }
             SemanticResultKey year = new SemanticResultKey(Slots.GradYear.ToString(), years);

             Choices yesOrNo = new Choices();
             yesOrNo.Add(new SemanticResultValue("yes", "yes"));
             yesOrNo.Add(new SemanticResultValue("yeah", "yes"));
             yesOrNo.Add(new SemanticResultValue("yep", "yes"));
             yesOrNo.Add(new SemanticResultValue("no", "no"));
             yesOrNo.Add(new SemanticResultValue("nope", "no"));
             SemanticResultKey yesNo = new SemanticResultKey(Slots.YesNo.ToString(), yesOrNo);

             Choices options = new Choices();
             options.Add(majorKey);
             options.Add(year);
             options.Add(yesNo);

             GrammarBuilder builder = new GrammarBuilder();
             builder.Append(options);
             grammar = new Grammar(builder);
        }

        private Choices getCommands()
        {
            var commands = new Choices();
            commands.Add(new SemanticResultValue("left", "left"));
            commands.Add(new SemanticResultValue("previous", "left"));

            commands.Add(new SemanticResultValue("right", "right"));
            commands.Add(new SemanticResultValue("next", "right"));

            commands.Add(new SemanticResultValue("enter", "enter"));
            commands.Add(new SemanticResultValue("accept", "enter"));
            commands.Add(new SemanticResultValue("ok", "enter"));
            commands.Add(new SemanticResultValue("go", "enter"));
            commands.Add(new SemanticResultValue("confirm", "enter"));

            commands.Add(new SemanticResultValue("quit", "exit"));
            commands.Add(new SemanticResultValue("exit", "exit"));
            commands.Add(new SemanticResultValue("back", "exit"));
            commands.Add(new SemanticResultValue("cancel", "exit"));
            commands.Add(new SemanticResultValue("return", "exit"));

            commands.Add(new SemanticResultValue("tv", "input"));
            commands.Add(new SemanticResultValue("television", "input"));

            commands.Add(new SemanticResultValue("up", "up"));
            commands.Add(new SemanticResultValue("more", "up"));
            commands.Add(new SemanticResultValue("higher", "up"));

            commands.Add(new SemanticResultValue("down", "down"));
            commands.Add(new SemanticResultValue("less", "down"));
            commands.Add(new SemanticResultValue("lower", "down"));

            return commands;
        }

        static void Main(string[] args)
        {
            try
            {
                ss.SetOutputToDefaultAudioDevice();
                Console.WriteLine("\n(Speaking: I am awake)");
                ss.Speak("I am awake");

                CultureInfo ci = new CultureInfo("en-us");
                sre = new SpeechRecognitionEngine(ci);
                sre.SetInputToDefaultAudioDevice();
                sre.SpeechRecognized += sre_SpeechRecognized;

                Choices ch_StartStopCommands = new Choices();
                ch_StartStopCommands.Add("Alexa record");
                ch_StartStopCommands.Add("speech off");
                ch_StartStopCommands.Add("klatu barada nikto");
                GrammarBuilder gb_StartStop = new GrammarBuilder();
                gb_StartStop.Append(ch_StartStopCommands);
                Grammar g_StartStop = new Grammar(gb_StartStop);

                sre.LoadGrammarAsync(g_StartStop);
                sre.RecognizeAsync(RecognizeMode.Multiple); // multiple grammars

                while (done == false) { ; }

                Console.WriteLine("\nHit <enter> to close shell\n");
                Console.ReadLine();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                Console.ReadLine();
            }
        }

        public VoiceSelect()
        {
            precision = .5;
            newWordReady = false;

            RecognizerInfo ri = GetKinectRecognizer();

            SpeechRecognitionEngine tempSpeechRec;

            tempSpeechRec = new SpeechRecognitionEngine(ri.Id);

            var grammar = new Choices();
            grammar.Add("select one", "SELECT ONE", "Select One");
            grammar.Add("select two", "SELECT TWO", "Select Two");
            grammar.Add("pause", "PAUSE");
            grammar.Add("exit", "EXIT");
            grammar.Add("single player", "SINGLE PLAYER");
            grammar.Add("co op mode", "CO OP MODE");
            grammar.Add("settings", "SETTINGS");
            grammar.Add("instructions", "INSTRUCTIONS");
            grammar.Add("statistics", "STATISTICS");
            grammar.Add("Main Menu", "MAIN MENU");
            grammar.Add("resume", "RESUME");
            grammar.Add("restart level", "RESTART LEVEL");
            grammar.Add("replay", "REPLAY");
            grammar.Add("next", "NEXT");
            grammar.Add("Easy", "EASY");
            grammar.Add("Hard", "HARD");
            /*
            grammar.Add("level one");
            grammar.Add("level two");
            grammar.Add("level three");
            grammar.Add("level four");
            grammar.Add("level five");
            grammar.Add("level six");
            grammar.Add("player one left");
            grammar.Add("player one right");
            grammar.Add("player two left");
            grammar.Add("player two right");
            grammar.Add("room low");
            grammar.Add("room medium");
            grammar.Add("room high");
            grammar.Add("sounds on");
            grammar.Add("sounds off");
            grammar.Add("reset stats");
            */

            var gb = new GrammarBuilder { Culture = ri.Culture };
            gb.Append(grammar);

            // Create the actual Grammar instance, and then load it into the speech recognizer.
            var g = new Grammar(gb);

            tempSpeechRec.LoadGrammar(g);
            tempSpeechRec.SpeechRecognized += phraseRecognized;
            tempSpeechRec.SpeechHypothesized += phraseHyphothesized;
            tempSpeechRec.SpeechRecognitionRejected += phraseRejected;

            speechRec = tempSpeechRec;
        }

        public VoiceInput()
        {
            recognizer = new SpeechRecognitionEngine(new CultureInfo("en-US"));

            recognizer.SetInputToDefaultAudioDevice();
            Choices choices = new Choices();
            foreach (String command in commands)
            {
                choices.Add(command);
            }
            choices.Add(startListening);
            choices.Add(stopListening);
            choices.Add(stop);
            /*choices.Add("Close");
            choices.Add("Left");
            choices.Add("Right");
            choices.Add("Tilt Left");
            choices.Add("Tilt Right");
            choices.Add("Move");
            choices.Add("Back");
            choices.Add("Move Up");
            choices.Add("Down");
            choices.Add("Exit");
            choices.Add("Stop");
            choices.Add("Start Listening");
            choices.Add("Stop Listening");*/
            Grammar grammar = new Grammar(new GrammarBuilder(choices));
            recognizer.LoadGrammar(grammar);

            recognizer.SpeechRecognized +=
                new EventHandler<SpeechRecognizedEventArgs>(SpeechRecognized);
            recognizer.RecognizeAsync(RecognizeMode.Multiple);
        }

        //here is the fun part: create the speech recognizer
        private SpeechRecognitionEngine CreateSpeechRecognizer()
        {
            //set recognizer info
            RecognizerInfo ri = GetKinectRecognizer();
            //create instance of SRE
            SpeechRecognitionEngine sre;
            sre = new SpeechRecognitionEngine(ri.Id);

            //Now we need to add the words we want our program to recognise
            var grammar = new Choices();
            grammar.Add("Record");
            grammar.Add("Store");
            grammar.Add("Replay");
            grammar.Add("Stop");
            grammar.Add("Learn");
            grammar.Add("Finish");

            //set culture - language, country/region
            var gb = new GrammarBuilder { Culture = ri.Culture };
            gb.Append(grammar);

            //set up the grammar builder
            var g = new Grammar(gb);
            sre.LoadGrammar(g);

            //Set events for recognizing, hypothesising and rejecting speech
            sre.SpeechRecognized += SreSpeechRecognized;
            sre.SpeechHypothesized += SreSpeechHypothesized;
            sre.SpeechRecognitionRejected += SreSpeechRecognitionRejected;
            return sre;
        }

        public void CreateAndLoadGrammarWithObjectsNames(string[] objNames)
        {
            // przesuwanie obiektow z wykorzystaniem nazw
            Choices objWithNames = new Choices(objNames);
            GrammarBuilder gbMOWN = new GrammarBuilder { Culture = recognizerInfo.Culture };
            gbMOWN.Append("move");
            gbMOWN.Append(new SemanticResultKey("OWN_MOVE_NAME", objWithNames));
            Grammar gMOWN = new Grammar(gbMOWN);

            // tworzenie obiektow z wykorzystaniem nazw, bez podawania kierunku
            GrammarBuilder gbCOWN = new GrammarBuilder { Culture = recognizerInfo.Culture };
            gbCOWN.Append("new");
            gbCOWN.Append(new SemanticResultKey("OWN_NEW_NAME", objWithNames));
            Grammar gCOWN = new Grammar(gbCOWN);

            // usuwanie obiektow z wykorzystaniem nazw
            GrammarBuilder gbROWN = new GrammarBuilder { Culture = recognizerInfo.Culture };
            gbROWN.Append("remove");
            gbROWN.Append(new SemanticResultKey("OWN_REMOVE_NAME", objWithNames));
            Grammar gROWN = new Grammar(gbROWN);

            // ladujemy wszystkie gramatyki
            speechEngine.LoadGrammar(gMOWN);
            speechEngine.LoadGrammar(gCOWN);
            speechEngine.LoadGrammar(gROWN);

            mainEngine.AddTextToLog("SpeechRec: " + "grammars loaded");
        }

        public override void Initiate(IEnumerable<string> commandKeys)
        {
            var choices = new Choices();
            choices.Add(commandKeys.ToArray());
            var gr = new Grammar(new GrammarBuilder(choices));
            _mainSpeechRecognitionEngine.RequestRecognizerUpdate();
            _mainSpeechRecognitionEngine.LoadGrammar(gr);
            _mainSpeechRecognitionEngine.SpeechRecognized += _mainSpeechRecognitionEngine_SpeechRecognized;

            try
            {
                _mainSpeechRecognitionEngine.SetInputToDefaultAudioDevice();
            }
            catch (Exception exception)
            {
                base.WriteLine(string.Format("Unable to set default input audio device. Error: {0}", exception.Message), OutputLevel.Error, null);
                return;
            }

            var subChoices = new Choices();
            subChoices.Add(new[] { "tab", "enter" });
            var subGr = new Grammar(new GrammarBuilder(subChoices));
            _subSpeechRecognitionEngine.RequestRecognizerUpdate();
            _subSpeechRecognitionEngine.LoadGrammar(subGr);
            _subSpeechRecognitionEngine.SpeechRecognized += _subSpeechRecognitionEngine_SpeechRecognized;
            _subSpeechRecognitionEngine.SetInputToDefaultAudioDevice();
        }

        public void InicializeSpeechRecognize()
        {
            RecognizerInfo ri = GetKinectRecognizer();
            if (ri == null)
            {
                throw new RecognizerNotFoundException();
            }

            try
            {
                    _sre = new SpeechRecognitionEngine(ri.Id);
            }
            catch(Exception e)
            {
                Console.WriteLine(e.Message);
                throw e;
            }

               var choises = new Choices();
            foreach(CommandSpeechRecognition cmd in _commands.Values)
            {
                choises.Add(cmd.Choise);
            }

            var gb = new GrammarBuilder {Culture = ri.Culture};
            gb.Append(choises);
            var g = new Grammar(gb);

            _sre.LoadGrammar(g);
            _sre.SpeechRecognized += SreSpeechRecognized;
            _sre.SpeechHypothesized += SreSpeechHypothesized;
            _sre.SpeechRecognitionRejected += SreSpeechRecognitionRejected;
        }

        internal void LoadCurrentSyllabus(SyllabusTracker syllabusTracker)
        {
            if (_speechRecognitionEngine == null) return; // not currently running recognition

            _speechRecognitionEngine.RequestRecognizerUpdate();
            _speechRecognitionEngine.UnloadAllGrammars();

            // new choices consolidation for commands - one command per syllabus file line
            var commandLoad = new Choices();
            foreach (var baseSyllabus in syllabusTracker.Syllabi)
            {
                foreach (var command in baseSyllabus.Commands)
                {
                    commandLoad.Add(command);
                }
            }

            // add commands - should be per input language, but now English
            VoiceCommands.AddCommands(commandLoad);

            var gBuilder = new GrammarBuilder();
            gBuilder.Append(commandLoad);
            var grammar = new Grammar(gBuilder) { Name = "Syllabus" };
            _speechRecognitionEngine.LoadGrammar(grammar);

            var dictgrammar = new DictationGrammar("grammar:dictation#pronunciation") { Name = "Random" };
            _speechRecognitionEngine.LoadGrammar(dictgrammar);
        }

 /*
  * Función: GetGrammar
  * Descripción: Función que llena y devuelve la gramática usando los vectores de comandos y el árbol de comandos
  * Autor: Christian Vargas
  * Fecha de creación: 16/08/15
  * Fecha de modificación: --/--/--
  * Entradas: Nodo inicial del árbol de comandos
  * Salidas: (Choices, gramática para entrenar a Kinect)
  */
 public static Choices GetGrammar(CommandNode commandTree)
 {
     grammar = new Choices();
     grammar.Add(UNLOCK_COMMAND);
     foreach (string command in GEOMETRIC_COMMANDS)
     {
         grammar.Add(command);
     }
     foreach (string command in MENU_COMMANDS)
     {
         grammar.Add(command);
     }
     foreach (string command in DICTATION_COMMANDS)
     {
         grammar.Add(command);
     }
     foreach (string characterSound in CHARACTERS_SOUNDS)
     {
         grammar.Add(characterSound);
     }
     foreach (string characterSound in ALT_CHARACTERS_SOUNDS)
     {
         grammar.Add(characterSound);
     }
     AddNodeToGrammar(commandTree);
     AddNumbers();
     return grammar;
 }

        public void initRS()
        {
            try
            {
                SpeechRecognitionEngine sre = new SpeechRecognitionEngine(new CultureInfo("en-US"));

                var words = new Choices();
                words.Add("Hello");
                words.Add("Jump");
                words.Add("Left");
                words.Add("Right");

                var gb = new GrammarBuilder();
                gb.Culture = new System.Globalization.CultureInfo("en-US");
                gb.Append(words);
                Grammar g = new Grammar(gb);

                sre.LoadGrammar(g);
                
                sre.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(sre_SpeechRecognized);
                sre.SetInputToDefaultAudioDevice();
                sre.RecognizeAsync(RecognizeMode.Multiple);
            }
            catch (Exception e)
            {
                label1.Text = "init RS Error : " + e.ToString();
            }
        }

        public SpeechRecogniser()
        {
            RecognizerInfo ri = SpeechRecognitionEngine.InstalledRecognizers().Where(r => r.Id == RecognizerId).FirstOrDefault();
            if (ri == null)
                return;

            sre = new SpeechRecognitionEngine(ri.Id);

            // Build a simple grammar of shapes, colors, and some simple program control
            var instruments = new Choices();
            foreach (var phrase in InstrumentPhrases)
                instruments.Add(phrase.Key);

            var objectChoices = new Choices();
            objectChoices.Add(instruments);

            var actionGrammar = new GrammarBuilder();
            //actionGrammar.AppendWildcard();
            actionGrammar.Append(objectChoices);

            var gb = new GrammarBuilder();
            gb.Append(actionGrammar);

            var g = new Grammar(gb);
            sre.LoadGrammar(g);
            sre.SpeechRecognized += sre_SpeechRecognized;
            sre.SpeechHypothesized += sre_SpeechHypothesized;
            sre.SpeechRecognitionRejected += new EventHandler<SpeechRecognitionRejectedEventArgs>(sre_SpeechRecognitionRejected);

            var t = new Thread(StartDMO);
            t.Start();

            valid = true;
        }