00:00 / 05:00 free
Idle
Live piano roll
last 12 seconds · brightness = velocity
Session transcript
0notes
–avg pitch
–range
Space Listen / stop
D Demo
C Clear
E Export
Esc Close dialogs
An honest listening engine
No cloud, no magic — just signal processing running in your browser at 60 frames a second.
〰️
Autocorrelation
The waveform is compared against time-shifted copies of itself. The shift where it best matches is one period of the sound — and one divided by that period is your pitch.
🎯
Cents precision
Every frequency maps onto the 12-tone scale around A440. The tuner shows how many cents (hundredths of a semitone) you are from dead center.
🔒
Local only
The microphone stream is analyzed in memory and discarded. Nothing is uploaded, stored, or sent — close the tab and it's gone.
AURA ONE
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⭐ Unlimited session length
💾 Transcript export
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