Advanced React speech-to-text library with real-time audio analysis and comprehensive speech metrics
npm install react-speech-to-text-gk



> ๐ค Advanced React speech-to-text library with real-time audio analysis, pitch detection, and comprehensive speech metrics.
Perfect for building voice-controlled applications, transcription tools, audio analysis dashboards, and speech-based interfaces.
- Features
- Installation
- Quick Start
- Live Demo
- API Reference
- Examples
- Performance
- Browser Support
- TypeScript
- Troubleshooting
- Contributing
pitchy)``bashnpm
npm install react-speech-to-text-gk
๐ฎ Live Demo
Try the interactive demo to see all features in action:
- Live Demo - See the library in action
- CodeSandbox - Play with the code
- GitHub Examples - Full example implementation
โก Quick Start
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`tsx
import { useSpeechToText } from 'react-speech-to-text-gk';function App() {
const { isListening, transcript, toggleListening } = useSpeechToText();
return (
{transcript}
);
}
`$3
`tsx
import { useSpeechToText, PerformanceMode } from 'react-speech-to-text-gk';function VoiceAnalyzer() {
const {
isListening,
transcript,
interimTranscript,
audioMetrics,
toggleListening,
clearTranscript
} = useSpeechToText({
language: 'en-US',
performanceMode: PerformanceMode.BALANCED
});
return (
{/ Real-time metrics /}
{isListening && (
Volume: {audioMetrics.currentVolume.toFixed(1)}%
Pitch: {audioMetrics.currentPitch || 'N/A'} Hz
)}
{/ Transcription /}
Final: {transcript}
{interimTranscript && (
{interimTranscript}
)}
);
}
`๐ API Reference
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The main hook that provides speech recognition with real-time audio analysis.
#### Parameters
| Property | Type | Default | Description |
|----------|------|---------|-------------|
|
language | string | 'es-ES' | Language code (supported languages) |
| silenceTimeout | number | 700 | Silence detection timeout in milliseconds |
| optimizedMode | boolean | true | Enable optimized recognition (fewer alternatives, faster) |
| performanceMode | PerformanceMode | BALANCED | Performance profile (SPEED/BALANCED/QUALITY) |
| audioConfig | object | {} | Audio constraints for getUserMedia API |#### Performance Modes
`typescript
enum PerformanceMode {
SPEED = 'speed', // ๐โโ๏ธ Low latency, minimal CPU usage
BALANCED = 'balanced', // โ๏ธ Optimal balance (default)
QUALITY = 'quality' // ๐ฏ Maximum accuracy, higher CPU usage
}
`#### Return Values
| Property | Type | Description |
|----------|------|-------------|
|
isListening | boolean | Current listening state |
| transcript | string | Final transcript text |
| interimTranscript | string | Interim (temporary) transcript |
| isSupported | boolean | Browser support check |
| silenceDetected | boolean | Silence detection state |
| sessionMetadata | SessionMetadata \| null | Complete session analysis |
| audioMetrics | AudioMetrics | Real-time audio data |
| chartData | ChartData | Chart-ready data |
| toggleListening | () => Promise | Start/stop listening |
| clearTranscript | () => void | Clear all data |
| copyMetadataToClipboard | () => Promise<{success: boolean; message: string}> | Export function |$3
Standalone hook for audio analysis without speech recognition.
#### Return Values
| Property | Type | Description |
|----------|------|-------------|
|
initializeAudioAnalysis | (config?) => Promise | Initialize audio context |
| stopAudioAnalysis | () => void | Stop audio analysis |
| getAudioData | () => AudioMetrics | Get current audio metrics |
| clearAudioData | () => void | Clear stored data |๐ก Examples
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`tsx
function VoiceControls() {
const { transcript, isListening, toggleListening } = useSpeechToText({
language: 'en-US'
}); // Simple voice commands
useEffect(() => {
const command = transcript.toLowerCase();
if (command.includes('navigate home')) {
// Handle navigation
} else if (command.includes('search for')) {
// Handle search
}
}, [transcript]);
return (
);
}
`$3
`tsx
function TranscriptionApp() {
const {
transcript,
interimTranscript,
isListening,
sessionMetadata,
toggleListening,
copyMetadataToClipboard
} = useSpeechToText({
language: 'en-US',
silenceTimeout: 2000,
performanceMode: PerformanceMode.QUALITY
}); return (
{sessionMetadata && (
)}
{transcript}
{interimTranscript}
{sessionMetadata && (
Duration: {(sessionMetadata.totalDuration / 1000).toFixed(1)}s
Words: {sessionMetadata.words.length}
Avg WPM: {((sessionMetadata.words.length / sessionMetadata.totalDuration) * 60000).toFixed(0)}
)}
);
}
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`tsx
function AudioDashboard() {
const {
audioMetrics,
sessionMetadata,
isListening,
toggleListening
} = useSpeechToText({
performanceMode: PerformanceMode.QUALITY,
silenceTimeout: 1500
}); return (
{isListening && (
Volume
${audioMetrics.currentVolume}% }} />
{audioMetrics.currentVolume.toFixed(1)}%
Pitch
{audioMetrics.currentPitch || 'N/A'} Hz
Spectral Centroid
{audioMetrics.currentSpectralCentroid || 'N/A'} Hz
)}
);
}
`โ๏ธ Configuration Guide
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| Mode | FFT Size | Update Rate | CPU Usage | Accuracy | Best For |
|------|----------|-------------|-----------|----------|----------|
| SPEED | 1024 | 15 FPS | Low โก | 90%+ | Real-time apps |
| BALANCED | 2048 | 20 FPS | Medium โ๏ธ | 95%+ | General use |
| QUALITY | 4096 | 30 FPS | High ๐ฅ | 98%+ | Audio analysis |
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`tsx
// ๐โโ๏ธ Real-time conversation
const speedConfig = {
performanceMode: PerformanceMode.SPEED,
silenceTimeout: 500,
optimizedMode: true
};// ๐ฏ High-quality transcription
const qualityConfig = {
performanceMode: PerformanceMode.QUALITY,
silenceTimeout: 1500,
optimizedMode: false
};
// โ๏ธ General purpose
const balancedConfig = {
performanceMode: PerformanceMode.BALANCED,
silenceTimeout: 700,
optimizedMode: true
};
`๐ Performance
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- โก Real-time processing - Sub-100ms latency
- ๐ง Smart memory management - Efficient garbage collection
- ๐ Optimized algorithms - Single-pass calculations
- ๐ฏ Early termination - Pitch detection with confidence thresholds
- ๐ Data bucketing - Efficient chart data generation
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| Feature | Performance | Memory Usage |
|---------|-------------|--------------|
| Speech Recognition | ~50ms latency | ~2MB |
| Audio Analysis | 60 FPS | ~1MB |
| Pitch Detection | 90% accuracy | Minimal |
๐ง Browser Support
| Browser | Speech Recognition | Audio Analysis | Status |
|---------|-------------------|----------------|---------|
| Chrome 25+ | โ
Full | โ
Full | ๐ข Recommended |
| Safari 14.1+ | โ
Full | โ
Full | ๐ข Supported |
| Edge 79+ | โ
Full | โ
Full | ๐ข Supported |
| Firefox | โ No | โ
Full | ๐ก Partial |
๐ Troubleshooting
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"Speech recognition not supported"
`tsx
const { isSupported } = useSpeechToText();if (!isSupported) {
return
Please use Chrome, Safari, or Edge;
}
`"Microphone permission denied"
`tsx
const { toggleListening } = useSpeechToText();try {
await toggleListening();
} catch (error) {
console.log('Microphone access denied');
}
`Performance issues
`tsx
// Use SPEED mode for better performance
const { ... } = useSpeechToText({
performanceMode: PerformanceMode.SPEED
});
`$3
`tsx
const { audioMetrics } = useSpeechToText();// Monitor performance
console.log('Volume data points:', audioMetrics.volumeData.length);
console.log('Current volume:', audioMetrics.currentVolume);
`๐ TypeScript Support
Full TypeScript support with comprehensive type definitions:
`tsx
import {
// Main hook
useSpeechToText,
useAudioAnalysis,
// Configuration types
SpeechToTextConfig,
PerformanceMode,
// Data types
AudioMetrics,
SessionMetadata,
WordMetadata,
ChartData,
// Utility types
generateSessionMetadata,
generateChartData
} from 'react-speech-to-text-gk';
`๐ฏ Use Cases
- ๐ค Voice-controlled interfaces
- ๐ Transcription applications
- ๐ Audio analysis tools
- ๐ต Music applications
- ๐ฃ๏ธ Speech therapy tools
- ๐๏ธ Podcast analytics
- ๐ฑ Accessibility features
๐ License
MIT License - feel free to use in commercial projects.
๐งช Development
`bash
Install dependencies
npm installBuild the package
npm run buildRun example app
npm run example:install
npm run example:startDevelopment mode (watch)
npm run dev
``๐ค Contributing
We welcome contributions! Please see our Contributing Guide.
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1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Add tests if applicable
5. Submit a pull request
---
Made with โค๏ธ for the React community
โญ Star on GitHub โข ๐ Report Bug โข ๐ก Request Feature