Pitch detector
Find out exactly what note you’re singing or playing. See the note, frequency in Hz and cents off pitch, plus a live pitch curve. Runs on your device; nothing is recorded.
Analyse a recording
The first 60 seconds are tracked at 50 frames per second.
Notes, frequencies and cents
Pitch is how high or low we hear a sound, and it follows the sound’s fundamental frequency. Concert A (A4) is 440 Hz, the reference fixed by ISO 16. Each octave doubles the frequency (A5 = 880 Hz, A3 = 220 Hz), and the twelve semitones in between are spaced by the same ratio, 21/12. A cent is a hundredth of that semitone, which is why tuners and pitch detectors report how far off you are in cents.
| Note | Octave 2 | Octave 3 | Octave 4 | Octave 5 |
|---|---|---|---|---|
| C | 65.41 Hz | 130.81 Hz | 261.63 Hz | 523.25 Hz |
| D | 73.42 Hz | 146.83 Hz | 293.66 Hz | 587.33 Hz |
| E | 82.41 Hz | 164.81 Hz | 329.63 Hz | 659.26 Hz |
| F | 87.31 Hz | 174.61 Hz | 349.23 Hz | 698.46 Hz |
| G | 98.00 Hz | 196.00 Hz | 392.00 Hz | 783.99 Hz |
| A | 110.00 Hz | 220.00 Hz | 440.00 Hz | 880.00 Hz |
| B | 123.47 Hz | 246.94 Hz | 493.88 Hz | 987.77 Hz |
Typical vocal ranges
| Voice type | Approximate range |
|---|---|
| Bass | E2 – E4 |
| Baritone | A2 – A4 |
| Tenor | C3 – C5 |
| Alto | F3 – F5 |
| Mezzo-soprano | A3 – A5 |
| Soprano | C4 – C6 |
Classical ranges as commonly given in voice-teaching references; untrained voices are often narrower and pop singers often use a different part of their range.
Tuning an instrument instead? The chromatic tuner has string presets for guitar, bass, ukulele, violin and more. To work out the key of a whole song, use the key finder.
Questions
How does the pitch detector work?
It listens through your microphone and, about 60 times a second, estimates the fundamental frequency with the YIN algorithm. That frequency is converted to the nearest note (for example A4 = 440 Hz) and the deviation in cents. All processing happens on your device; nothing is recorded or uploaded.
What note am I singing?
Press Start and sing a steady vowel like “ah”. The large readout shows the note and octave, the frequency in Hz, and how many cents sharp (+) or flat (−) you are. The curve shows how steady you held it.
How do I find my vocal range?
Start the detector, sing from your lowest comfortable note to your highest, and read the Lowest and Highest values. The tool compares your range with the usual classical voice-type ranges (bass, baritone, tenor, alto, mezzo-soprano, soprano). Treat it as a guide; voice type also depends on timbre and where your voice feels comfortable.
Can I detect the pitch of an audio file?
Yes. Drop an MP3, WAV or M4A file into “Analyse a recording”. The detector tracks pitch through the first 60 seconds and plots it, with the most common notes listed. It works best on a single voice or instrument; full mixes with chords confuse any single-pitch detector.
Why does the reading jump an octave?
Some sounds have a stronger overtone than fundamental, especially low notes on small speakers. The detector briefly “hears” the overtone. Sing or play a little louder and closer to the mic; the median filter usually settles it within a fraction of a second.
What is a good pitch accuracy for singing?
Studies of trained singers commonly report average deviations of roughly 10–25 cents on sustained notes. Within ±10 cents sounds in tune to most listeners. The stability score here reflects how much your pitch wavers while you hold a note.