On Day 8, we’ll enhance the voice recognition system by adding multilingual support and enabling voice commands. This will allow users to interact with the avatar in different languages and control expressions using their voice.
1. Why Add Multilingual Support?
✅ Global Reach: Supports multiple languages (English, Spanish, Chinese, etc.).
✅ Voice-Based Controls: Users can say “smile” or “blink” to trigger expressions.
✅ Enhanced Accessibility: Users can control the avatar hands-free.
We’ll use:
🔹 React Native Voice (for speech-to-text recognition).
🔹 Google Cloud Speech API (for advanced language support).
2. Installing and Configuring Multilingual Voice Recognition
Step 1: Update React Native Voice
Ensure react-native-voice is installed:
npm install react-native-voice
Step 2: Modify VoiceProcessor.js to Support Multiple Languages
import Voice from 'react-native-voice';
import { useState, useEffect } from 'react';
export default function useVoiceRecognition() {
const [isSpeaking, setIsSpeaking] = useState(false);
const [recognizedText, setRecognizedText] = useState('');
const [language, setLanguage] = useState('en-US'); // Default English
useEffect(() => {
Voice.onSpeechStart = () => setIsSpeaking(true);
Voice.onSpeechEnd = () => setIsSpeaking(false);
Voice.onSpeechResults = (event) => {
setRecognizedText(event.value[0]);
};
return () => {
Voice.destroy().then(Voice.removeAllListeners);
};
}, []);
const startListening = () => Voice.start(language);
const stopListening = () => Voice.stop();
return { isSpeaking, recognizedText, startListening, stopListening, setLanguage };
}
3. Adding a Language Selector
Modify VoiceSettings.js to allow users to change the language:
import { Picker } from '@react-native-picker/picker';
export default function LanguageSelector({ onChangeLanguage }) {
return (
<Picker onValueChange={(value) => onChangeLanguage(value)} selectedValue="en-US">
<Picker.Item label="English" value="en-US" />
<Picker.Item label="Spanish" value="es-ES" />
<Picker.Item label="French" value="fr-FR" />
<Picker.Item label="Chinese" value="zh-CN" />
</Picker>
);
}
Modify AvatarRenderer.js to update the language dynamically:
const [language, setLanguage] = useState('en-US');
<LanguageSelector onChangeLanguage={setLanguage} />
<VoiceProcessor language={language} />
4. Implementing Voice Commands for Avatar Expressions
Step 1: Define Voice Command Actions
Modify AvatarRenderer.js to handle commands like “smile” and “blink”:
const voiceCommands = {
smile: () => setFacialExpressions((prev) => ({ ...prev, isSmiling: true })),
frown: () => setFacialExpressions((prev) => ({ ...prev, isSmiling: false })),
blink: () => setFacialExpressions((prev) => ({ ...prev, isBlinking: true })),
openEyes: () => setFacialExpressions((prev) => ({ ...prev, isBlinking: false })),
};
Step 2: Process Recognized Speech
Modify VoiceProcessor.js:
useEffect(() => {
if (recognizedText.toLowerCase() in voiceCommands) {
voiceCommands[recognizedText.toLowerCase()]();
}
}, [recognizedText]);
5. Testing Multilingual Voice Commands
Step 1: Run the App
expo start
Step 2: Switch Language & Test Commands
- Select Spanish and say “sonríe” (smile).
- Select French and say “cligner” (blink).
- Confirm the avatar responds accordingly.
6. Optimizing Voice Processing Performance
- Use Cloud Speech APIs for better recognition accuracy:
const googleSpeechURL = 'https://speech.googleapis.com/v1/speech:recognize?key=YOUR_GOOGLE_CLOUD_API_KEY';
- Filter out background noise by adjusting sensitivity thresholds.
7. Key Concepts Covered
✅ Enabled multilingual voice recognition.
✅ Added voice commands for avatar expressions.
✅ Allowed users to switch languages dynamically.
8. Next Steps: Adding Real-Time Security Features
Tomorrow, we’ll:
🔹 Add face authentication (unlocking avatar features with a face scan).
🔹 Implement privacy & data security measures.
9. References & Learning Resources
10. SEO Keywords:
React Native multilingual speech, AI voice commands, speech-to-avatar sync, voice control in mobile apps, real-time AI avatar commands.
