Audio Toolkit - Sound Analyzer

Audio Toolkit is a lightweight, all-in-one audio utility suite designed for musicians, sound engineers, and audio enthusiasts.

PITCH DETECTOR
Detect the pitch of any sound in real time using your device's microphone. Displays note name, octave, frequency (Hz), and cent deviation with a visual tuning meter. Perfect for tuning instruments, vocal practice, or acoustic analysis.
- Real-time autocorrelation-based pitch detection
- Visual cents meter with in-tune indicator
- Adjustable detection sensitivity
- Frequency range: 20 Hz – 4000 Hz

FREQUENCY GENERATOR
Generate precise audio tones with full control over frequency and waveform. Ideal for testing speakers, hearing tests, sound experiments, and calibration.
- Four waveforms: Sine, Square, Triangle, Sawtooth
- Frequency range: 20 Hz – 20,000 Hz (full audible spectrum)
- Intuitive rotary knob with fine-tune buttons
- Real-time oscilloscope visualization
- Preset quick-access frequencies
- Volume control
- Settings are saved between sessions

DECIBEL METER
Measure ambient sound levels in real time. Monitor noise exposure with color-coded dB readings and a built-in reference chart.
- Real-time dB measurement
- Color-coded levels: Quiet, Moderate, Loud, Very Loud
- Min / Max / Average statistics
- Live history bar chart
- dB reference scale with real-world examples (whisper, conversation, traffic, etc.)

FEATURES
- Ultra-lightweight: less than 60 KB install size
- No ads, no tracking, no internet required
- Works completely offline
- Minimal permissions — microphone only, requested on demand
- Dark theme optimized for all screen sizes
- Supports 10 languages: English, Chinese (Simplified/Traditional), Japanese, Korean, German, French, Russian, Portuguese (Brazil), Spanish