Uwarp

Current note

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Sing or hum a steady vowel toward your microphone

Stability

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Average Hz

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Voice pitch analyzer

Analyze vocal pitch in real time from your microphone. See note names, Hz, cents deviation, stability, and a live pitch curve—free in your browser.

What is a voice pitch analyzer?

A voice pitch analyzer listens through your microphone, estimates the fundamental frequency of your voice, and shows the closest musical note, Hz value, and cents deviation in real time. This vocal pitch monitor helps singers and speakers answer what note am I singing while tracking stability across a practice session. For raw Hz without note names, use /frequency-detector. To review a finished recording, use /audio-file-pitch-detector.

Vocal pitch analyzer features

Real-time note detection with session stats and a scrolling pitch curve.

  • Live note and cents readout

    See the current note name, Hz, and cents from equal temperament as you sing or speak.

  • Pitch stability score

    Session stability reflects how steadily you hold pitch based on cents variance.

  • Low, average, and high Hz

    The tool logs the lowest, mean, and highest frequencies detected during the session.

  • Scrolling pitch curve

    Watch pitch movement over time to spot drift, vibrato, and phrase endings.

  • Concert A reference

    Switch A4 between 440, 432, and 442 Hz before you start analysis.

  • Local microphone processing

    Audio is analyzed in your browser and is not uploaded to a server.

How to use the vocal pitch detector

Start analyzing voice pitch in a few steps.

  1. Start analysis

    Click Start analysis and allow microphone access when prompted.

  2. Sing a steady vowel

    Hold ah or hum for a few seconds at a comfortable volume in a quiet room.

  3. Read note, Hz, and cents

    Use the large note display and cents meter to see how close you are to the pitch center.

  4. Review stability and range

    Check the stability percentage and lowest/highest Hz logged during the session.

Tips for accurate vocal pitch detection

Get cleaner readings from this online pitch detector.
  • 01

    Use a quiet room

    Fans, traffic, and room hum add noise that can hide your vocal pitch.

  • 02

    Hold one note

    Sustained vowels work best. Fast runs and slides are harder to read clearly.

  • 03

    Stay 20–30 cm from the mic

    A consistent distance helps level stay above the silence gate on laptop mics.

  • 04

    Try medium smoothing first

    Increase smoothing if the display flickers; lower it for faster response.

  • 05

    Pair with file review

    Practice live here, then upload the same take to /audio-file-pitch-detector for a full trace.

  • 06

    Train pitch memory

    After checking notes, challenge yourself on /sound-memory-game.

Sources & References

Authoritative references on pitch detection, vocal analysis, and the audio technology this voice pitch analyzer uses.
  • “A pitch detection algorithm is a computational algorithm designed to estimate the pitch or fundamental frequency of a quasiperiodic or virtually periodic audio signal.”
    — Wikipedia — Pitch detection algorithm

    Pitch detection algorithm (PDA): This voice pitch analyzer uses a time-domain pitch detection approach (autocorrelation-based) to estimate the fundamental frequency of live vocal input, identifying note names and cents deviation in real time. en.wikipedia.org/wiki/Pitch_detection_algorithm

  • “The cent is a logarithmic unit of measure used for musical intervals. Twelve-tone equal temperament divides the octave into 12 semitones each 100 cents in width.”
    — Wikipedia — Cent (music)

    Cents — logarithmic pitch interval measurement: Cents deviation shows how far the detected pitch is from the nearest equal-temperament note. A value of 0 means perfectly in tune; positive or negative values indicate sharpness or flatness. en.wikipedia.org/wiki/Cent_(music)

  • “Concert pitch is the pitch reference to which a group of musical instruments are tuned for a performance. The standard A4 is 440 Hz.”
    — Wikipedia — Concert pitch

    Concert pitch and A4 = 440 Hz standard: Users can switch the A4 reference between 440 Hz, 432 Hz, and 442 Hz before analysis, accommodating different tuning standards used across classical, modern, and historical contexts. en.wikipedia.org/wiki/Concert_pitch

  • “The MediaDevices.getUserMedia() method prompts the user for permission to use a media input which produces a MediaStream containing tracks of the requested types.”
    — MDN Web Docs — MediaDevices.getUserMedia

    Web Audio API and MediaDevices.getUserMedia: Live microphone input is obtained via getUserMedia. Audio frames are processed through the Web Audio API in the browser — no audio is uploaded to a server. developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia

  • “The fundamental frequency, often referred to simply as the fundamental, is the lowest frequency of a periodic waveform. In music, the fundamental determines the perceived pitch of a note.”
    — Wikipedia — Fundamental frequency

    Fundamental frequency and vocal pitch perception: The analyzer extracts F0 from voiced speech or singing frames, then maps the Hz value to the nearest note name, displaying both the raw frequency and the musical note simultaneously. en.wikipedia.org/wiki/Fundamental_frequency

  • “Equal temperament is a musical tuning system in which the frequency interval between every pair of adjacent notes has the same ratio, dividing the octave into 12 equal semitones.”
    — Wikipedia — Equal temperament

    Equal temperament tuning system: Detected Hz values are mapped to the nearest note in the A4 = {reference} Hz equal-temperament scale. Note names (C, C#, D, etc.) and cents deviation are reported relative to this scale. en.wikipedia.org/wiki/Equal_temperament

Frequently Asked Questions

Quick answers about this tool—open a question to read more.