Record a clap, a bounce, a tuning fork, or your voice. Then scrub or play back the recording to inspect the waveform, oscilloscope, spectrum, and spectrogram at any instant, and export the data.
Microphone not enabledtime: 0.0 s
input level
sample rate
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duration (s)
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max amp
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avg amp
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fundamental (Hz)
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note
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dominant (Hz)
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period (s)
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record something, then drag the waveform to scrub
waveform, amplitude vs time
oscilloscope, cycles at the playhead
frequency spectrum at the playhead
spectrogram, frequency vs time (0 to 6 kHz)
Export
The waveform CSV is time and amplitude, thinned to a readable rate. The spectrum CSV is frequency and magnitude for each frequency bin.
Safety. Avoid extremely loud sounds close to the microphone.
Fundamental vs dominant. The fundamental is the true pitch, found from the shape of the wave itself (autocorrelation), so it stays right even when a higher overtone is louder. The dominant is simply the loudest single frequency. For a clean tuning fork they agree; for a voice or a plucked string they can differ.
Trust the number? The tonality badge tells you: clean tone means the pitch is solid, while broadband means the sound (a clap or a bounce) has no single pitch, so treat those numbers loosely. A possible clipping warning means the recording was too loud and the spectrum is distorted, so move back and record again.