Update of vosk with help of @nshmyrev

Part 2

Author: mytja

speech_recognition/__init__.py

@@ -1404,6 +1404,11 @@ def recognize_vosk(self, audio_data, language='en'):
         assert isinstance(audio_data, AudioData), "Data must be audio data"
         import pyaudio
 
+        if not hasattr(self, 'vosk_model'):
+            self.vosk_model = Model()
+
+        rec = KaldiRecognizer(self.vosk_model, 16000);
+        
         rec.AcceptWaveform(audio_data.get_raw_data(convert_rate=16000, convert_width=2));
         finalRecognition = rec.FinalResult()