Audio Tone Generator & Frequency Synthesizer
Generate pure sine, square, sawtooth, and triangle sound waves from 20 Hz to 20,000 Hz with real-time oscilloscope.
How to Use Audio Tone Generator & Frequency Synthesizer
1. Set Frequency & Waveform
Enter a pitch in Hertz (Hz) or slide from 20 Hz to 20,000 Hz, and choose Sine, Square, Triangle, or Sawtooth.
2. Start Pure Tone Audio
Click Play to synthesize pure sound waves in real time via the browser native Web Audio API.
3. Adjust Pitch & Volume
Modulate frequency and gain smoothly with zero clipping, pop artifacts, or audio latency.
How This Utility Works
A high-precision Web Audio API tone generator and acoustic oscillator. Features continuous frequency sweeps from 20 Hz to 20 kHz, stereo panning, volume ramp envelopes to eliminate speaker clicks, musical note pitch presets (A4 440 Hz, Verdi 432 Hz, Middle C), and an animated real-time oscilloscope.
Audio oscillators and microphone frequency spectrum analyzers process data in volatile RAM via Web Audio API. Audio streams are never recorded or saved.
Frequently Asked Questions
What frequencies can the human ear detect?
The typical human hearing range spans from 20 Hz to 20,000 Hz (20 kHz). Low frequencies (20-100 Hz) produce deep sub-bass vibrations, while high frequencies (12-20 kHz) produce high-pitched treble tones.
What is the difference between 440 Hz and 432 Hz?
440 Hz is the modern ISO standard concert pitch for tuning musical instruments (Concert A). 432 Hz (often called Verdi pitch) is an alternative tuning celebrated in acoustical and classical tradition.
Can this tool test audio speakers and headphones?
Yes! You can test subwoofer low-frequency limits, inspect stereo left/right panning separation, and check speaker driver clarity across the spectrum.
Standard Musical & Acoustic Frequencies
| Pitch / Tone | Frequency (Hz) | Audio Octave | Acoustic Characteristic |
|---|---|---|---|
| Sub-Bass Cutoff | 20–60 Hz | Octave 0–1 | Felt as physical vibration rather than pitch |
| Middle C (C4) | 261.63 Hz | Octave 4 | Center reference note on piano keyboard |
| Concert Pitch (A4) | 440.00 Hz | Octave 4 | Universal orchestral tuning standard (ISO 16) |
| Presence / Sibilance | 4,000–8,000 Hz | Octave 7–8 | Vocal clarity and consonant articulation |
| Human Hearing Cap | 16,000–20,000 Hz | High Treble | Upper limit of healthy human auditory perception |