FreeHow the pitch detector works
The page listens through your microphone and looks for the pattern that repeats in the sound wave. How often it repeats per second is the pitch in hertz (Hz), and that is matched to the nearest note on a standard piano. The needle shows how far you are from the centre of that note in cents (100 cents make one semitone), and turns green within 10 cents.
The graph draws your pitch over the last ten seconds, with a line for every note. A flat line means a steady note; wobbles show vibrato or drifting, which makes it a handy practice tool for singers.
Things you can do with it
- Find out what note you're singing, or the note of a song you're humming.
- Practise holding a note and keep the line flat on the graph.
- Check an instrument such as a flute, harmonica or piano key. To tune strings, the tuner is easier.
- Find your vocal range with the vocal range test.
Frequently asked questions
Why does it show the wrong octave sometimes?
Some voices and instruments have strong overtones that can be mistaken for a note an octave higher or lower. Sing a clear "oo" or "ah" and move a little closer to the microphone.
What do the numbers after the note mean?
They are the octave. Middle C on a piano is C4, and the A above it, usually 440 Hz, is A4.
Is my voice recorded?
No. The sound is analysed live in your browser and is never saved or sent anywhere.