how to convert the sound wave of the currently playing song to a text

ok...thnx...but kindly guide me about its code actually i have code which convert a english sentence with SAPI API but unable for song kindly update following code ..

using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using EllisMIS.Audio.Transcription.Microsoft; namespace MicrosoftSpeechToTextExample { public partial class Form1 : Form { Dictation _transcriber; public Form1() { InitializeComponent(); } private void btnWavFile_Click(object sender, EventArgs e) { ///Not sure if a .Dispose is needed at all, but threw it in there. if (_transcriber != null) { _transcriber.Dispose(); } _transcriber = new Dictation(); SetEvents(); _transcriber.Start("example.wav"); } void _transcriber_SpeechHypothesizingEvent(object sender, System.Speech.Recognition.SpeechHypothesizedEventArgs e) { Console.WriteLine("Speech Recognizing: " + e.Result.Text); } void transcriber_SpeechRecognizedEvent(object sender, System.Speech.Recognition.SpeechRecognizedEventArgs e) { Console.WriteLine("Speech Recognized: " + e.Result.Text); } public void SetEvents() { _transcriber.SpeechRecognizedEvent -= new Dictation.SpeechRecognizedEventHandler(transcriber_SpeechRecognizedEvent); _transcriber.SpeechHypothesizingEvent -= new Dictation.SpeechHypothesizingEventHandler(_transcriber_SpeechHypothesizingEvent); _transcriber.SpeechRecognizedEvent += new Dictation.SpeechRecognizedEventHandler(transcriber_SpeechRecognizedEvent); _transcriber.SpeechHypothesizingEvent += new Dictation.SpeechHypothesizingEventHandler(_transcriber_SpeechHypothesizingEvent); } using System; using System.IO; using System.Speech.Recognition; namespace EllisMIS.Audio.Transcription.Microsoft { public class Dictation : IDisposable { #region Local Variables private SpeechRecognitionEngine _speechRecognitionEngine = null; private DictationGrammar _dictationGrammar = null; private bool _disposed = false; #endregion #region Constructors public Dictation() { ConstructorSetup(); } public Dictation(DictationGrammar targetGrammar) { _dictationGrammar = targetGrammar; ConstructorSetup(); } #endregion /// /// Start the transcriber using your default microphone. /// public void Start() { _speechRecognitionEngine.SetInputToDefaultAudioDevice(); StartSetup(); } /// /// Transcribe a .wav file /// /// <param name="targetWavFile"></param> public void Start(string targetWavFile) { if (!File.Exists(targetWavFile)) { throw new FileNotFoundException("Specified WAV file does not exist.", "targetWavFile"); } _speechRecognitionEngine.SetInputToWaveFile(targetWavFile); StartSetup(); } private void StartSetup() { if (_dictationGrammar == null) { _dictationGrammar = new DictationGrammar(); } _speechRecognitionEngine.LoadGrammar(_dictationGrammar); _speechRecognitionEngine.RecognizeAsync(RecognizeMode.Multiple); _speechRecognitionEngine.SpeechRecognized -= new EventHandler(SpeechRecognized); _speechRecognitionEngine.SpeechHypothesized -= new EventHandler(SpeechHypothesizing); _speechRecognitionEngine.Sp