Hello,
I am trying to use the speech recognition system from the .NET 3.0 framework within Unity. I therefore have imported the System.Speech.dll, from .NET 3.0 since higher version did not work, into the assets folder together with its dependencies. I know that what I am trying to do might not work because Unity uses .NET 2.0, but I still want to give it a try. It all seems to work and I can run the game fine, but when I run it I get the error:
NullReferenceException: Object reference not set to an instance of an object
System.Speech.Internal.ObjectTokens.RegistryDataKey.HKEYfromRegKey (Microsoft.Win32.RegistryKey regKey)
System.Speech.Internal.ObjectTokens.RegistryDataKey.RootHKEYFromRegPath (System.String rootPath)
System.Speech.Internal.ObjectTokens.RegistryDataKey.Open (System.String registryPath, Boolean fCreateIfNotExist)
System.Speech.Internal.ObjectTokens.ObjectTokenCategory.Create (System.String sCategoryId)
System.Speech.Recognition.SpeechRecognitionEngine.InstalledRecognizers ()
VoiceCommandListener.Start () (at Assets/Scripts/VoiceCommandListener.cs:14)
The line of code is:
SpeechRecognitionEngine speechRecognitionEngine = new SpeechRecognitionEngine(SpeechRecognitionEngine.InstalledRecognizers()[0]);
When I run the same line of code outside of Unity it works fine and just grabs the default and first recognizer, but somehow it doesn't work within Unity.
I have tried switching between using .NET 2.0 instead of .NET 2.0 subset, or running the following code block instead:
SpeechRecognitionEngine speechRecognitionEngine = null;
foreach (RecognizerInfo info in SpeechRecognitionEngine.InstalledRecognizers()) {
if (info.Culture.Equals(requiredCulture) && info.Id == requiredId ) {
speechRecognitionEngine = new SpeechRecognitionEngine(info);
break;
}
}
This gives the same result and this time again at the line of code which uses "SpeechRecognitionEngine.InstalledRecognizers()".
Does anybody know why it does not return anything?
Thanks in advance.
Ron
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