Audio Frequency Analyzer
Measure audio frequencies, detect dominant pitch in Hertz (Hz), and test sound systems with precision tone generation.
Live Frequency & Pitch Analyzer
Automatic peak frequency detection displays the loudest sound frequency in Hertz and identifies the corresponding musical note in real time.
Audio Visualizer Ready
Click microphone, upload an audio file, or play a demo sample to start.
How It Works
Three simple steps to start analyzing audio frequencies in your browser.
Choose Audio Source
Select "Start Microphone" for live acoustic measurement, "Upload Audio File" for local MP3/WAV tracks, or play a synthetic demo sample.
Select Visualizer Mode
Switch between Spectrogram (waterfall frequency over time), Spectrum Analyzer (real-time FFT bars), or Waveform (time-domain oscilloscope).
Inspect & Save
Hover over the display to inspect exact frequencies in Hertz and decibels. Click Freeze to pause, or Export PNG to save your chart.
Built for Accurate Frequency Analysis
Everything needed to visualize and analyze audio frequencies without installing desktop software.
Microphone & Audio File Input
Capture live mic input in real time or upload local MP3, WAV, FLAC, and OGG tracks for instant spectral inspection.
Zero-Latency Web Audio FFT
Processes signals directly in the browser via the HTML5 Web Audio API and Fast Fourier Transform algorithms at 60 FPS.
100% Client-Side Privacy
No sound data or voice recordings leave your device. All DSP calculations execute locally in memory on your CPU.
Scientific Heatmap Palettes
Toggle between industry-standard color palettes including Inferno, Viridis, Magma, and High-Contrast monochrome.
Interactive Frequency Inspector
Hover anywhere over the canvas to view exact frequency in Hertz (Hz), pitch note, and decibel amplitude under your cursor.
Image Snapshot Export
Freeze and export clean, high-resolution PNG image snapshots for research, mastering, or acoustic documentation.
Audio Frequency Analyzer FAQs
What is an audio frequency analyzer used for?
An audio frequency analyzer measures the exact frequency (in Hertz, or cycles per second) of sounds picked up by your microphone or played through audio files. It helps musicians tune instruments, acoustic engineers calibrate room sound, and technicians detect electrical hum.
What frequency range can humans hear?
The typical human hearing range spans from 20 Hz (very low deep rumble) up to 20,000 Hz (20 kHz, extremely high pitch air and shimmer). As humans age, high-frequency hearing sensitivity naturally declines.
How accurate is the online frequency detector?
Our frequency analyzer utilizes the native 32-bit floating point audio pipeline of the Web Audio API with configurable FFT resolution up to 4096 bins, providing accuracy within ~5 Hz across standard audio sample rates.