Please be aware that this application is in active development. While the core tuning functionality and basic features have been thoroughly tested, the project is continuously evolving with planned improvements and additional capabilities. Future updates may introduce enhanced audio processing algorithms, support for more instruments, advanced visualization features, and refined user experience. Thank you for your understanding and support.
This is a guitar tuner, written in and for educational and demonstrational purposes.
An online professional guitar tuner with real-time audio analysis - works directly in the browser without additional software installation. Provides precise tuning through microphone with advanced autocorrelation algorithm, intuitive interface, and support for various tunings including custom configurations. Features professional-grade accuracy with harmonic filtering and edge case protection.
Based on tech stack:
- HTML,
- TypeScript,
- Nuxt,
- Vue,
- CSS,
- TailwindCss.
- Standard Guitar Tuning: EADGBE (6-string)
- Alternative Guitar Tunings: Drop D, DADGAD, Open G, Open D, Drop C, ½ Step Down, Open C
- Bass Guitar Support: 4-string and 5-string bass tunings
- Ukulele Tunings: Soprano, Concert, Tenor, and Baritone variations
- World Instruments: Balalaika, Domra, Shamisen, Oud, Sitar tunings
- Custom Tunings: Create, edit and save custom tunings for any string instrument
- Real-Time Audio Analysis: Web Audio API with autocorrelation algorithm for precise frequency detection
- Visual Tuning Indicators: Color-coded feedback (blue - low, green - in tune, red - high)
- Cent-Based Precision: Deviation display in cents with moving indicator
- Reference Audio: Listen to correct pitch for each string
- Multi-Band Support: Configurable custom tunings
- Theme System: Light/dark modes
- Local Storage: All settings and custom tunings saved locally
- Enhanced Autocorrelation Algorithm: Advanced pitch detection with adaptive windowing and median filtering
- Harmonic Filtering: Intelligent rejection of octave harmonics and noise
- Stagnation Prevention: Dynamic buffer reset to prevent frequency "sticking"
- Robust Signal Validation: Multiple validation stages with confidence scoring
- Edge Case Protection: Safe handling of extreme frequencies and NaN values
- Adaptive Smoothing: Weighted moving average with exponential decay for stable readings
- Octave Correction: Smart frequency doubling/halving for out-of-range detection
Look at the Nuxt documentation to learn more.
Make sure to install dependencies:
# npm
npm install
# pnpm
pnpm install
# yarn
yarn install
# bun
bun installStart the development server on http://localhost:3000:
# npm
npm run dev
# pnpm
pnpm dev
# yarn
yarn dev
# bun
bun run devBuild the application for production:
# npm
npm run build
# pnpm
pnpm build
# yarn
yarn build
# bun
bun run buildLocally preview production build:
# npm
npm run preview
# pnpm
pnpm preview
# yarn
yarn preview
# bun
bun run previewCheck out the deployment documentation for more information.
- Standard Guitar Tuning: Quick tuning of 6-string guitar in EADGBE
- Alternative Tunings: Switch between popular alternative guitar tunings
- Other Instruments: Tune bass guitars, ukuleles, and world instruments
- Custom Tunings: Create and use custom tunings for non-standard instruments
- Performance Use: Quick tuning checks during rehearsal or performance
- Frequency Detection Range: 1-2000 Hz with safe edge case handling
- Precision: ±1 cent resolution with professional-grade accuracy
- Audio Processing: 8192-point FFT with optimized autocorrelation algorithm
- Signal Processing: RMS-based noise rejection with dynamic thresholding
- Real-Time Analysis: 60fps continuous audio processing
- Responsive Design: Mobile-first adaptive interface with grid-based layouts
- Browser Support: Modern browsers with Web Audio API support
- Zero Installation: Works entirely in browser with local storage persistence
- Web Audio API: Microphone input and frequency analysis
- Autocorrelation Algorithm: Precise fundamental frequency detection
- Reference Tone Generation: Clean sine wave reference tones
- Noise Reduction: RMS-based silence detection
- Reactive Composables: Modular state management with useTuner()
- Local Persistence: Automatic saving of custom tunings and preferences
- Real-Time Updates: Continuous audio analysis with requestAnimationFrame
- Responsive Grid: Adaptive string layout for 1-10+ strings
- Visual Feedback: Color-coded status indicators
- Smooth Animations: CSS transitions for all interactive elements
- Accessibility: Semantic HTML and ARIA labels
Requires a modern browser with:
- Web Audio API support
- MediaDevices.getUserMedia()
- ES2022+ JavaScript features
- CSS Grid and Flexbox
Recommended browsers:
- Chrome 90+
- Firefox 90+
- Safari 15+
- Edge 90+
The 'Guitar tuner' is open-sourced software licensed under the MIT license.