📊 Audio Spectrum Analyzer

Q: What frequency range does it analyze?

It analyzes the full human hearing range from 20Hz to 20kHz, covering low, mid, and high frequency bands.

Q: How do I read the spectrum display?

The horizontal axis shows frequency (low to high), the vertical axis shows amplitude (volume). Higher peaks indicate stronger energy at that frequency.

Real-time FFT audio analysis — spectrum display, frequency identification

Updated: 2026-07-11

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📖 How to Use the Spectrum Analyzer

❓ Frequently Asked Questions

Is the audio spectrum analyzer free?

Yes, it's completely free with no registration or login required. Use it directly in your browser without installing any software.

Will my audio data be uploaded to a server?

No. All audio processing happens locally in your browser. No data is ever sent to any server — your privacy is fully protected.

What frequency range does it analyze?

It analyzes the full human hearing range from 20Hz to 20kHz. Low frequencies (20-250Hz) correspond to bass and drums, mids (250-4kHz) to vocals and instruments, and highs (4-20kHz) to harmonics and detail.

How do I read the spectrum display?

The horizontal axis shows frequency from low (left) to high (right). The vertical axis shows amplitude (volume). Higher peaks mean stronger energy at that frequency. Colors range from dark blue (low energy) to bright yellow (high energy).

Why does the spectrum keep fluctuating?

The spectrum responds to ambient sound in real-time. Even in quiet environments, background noise from computer fans or air conditioning can cause slight fluctuations. This is completely normal.