FreqScope
A real-time audio frequency analyzer and spectrogram, right in your browser.
Spectrum
20 Hz – 20 kHz · Level (dB)Peak frequency
— Hz
Peak level · relative
— dB
Start your microphone or open an audio file
to see the spectrum.
to see the spectrum.
Spectrogram
Frequency over timeQUIETLOUD
Sound history appears here as you listen
OLDERNOW →
About the analyzer
The spectrum shows which frequencies are present. The spectrogram shows how they change over time.
Privacy
Audio is analyzed on your device. Signal levels are relative, not calibrated sound pressure measurements.