Audio Spectrum Analyzer & Spectrogram
See sound frequencies live from your microphone — real-time spectrum bars and a scrolling spectrogram, with the loudest frequency and note shown.
How to use
- 1Press Start and allow microphone access.
- 2Make a sound — the spectrum and spectrogram update live. Hover to read frequencies.
Frequently asked questions
What is a spectrogram?
A picture of sound over time: frequency on the vertical axis, time horizontally, and color for loudness.
What can I use it for?
Finding hum or feedback frequencies, checking whistles or tones, teaching physics, or just seeing your voice.
Is the audio recorded?
No — it's analyzed live in your browser and never stored.