Free online voice pitch analyzer.
See every note it hits.

Read a short passage aloud and VoiceScope maps your pitch in real time — frequency in hertz, musical notes, and how it moves over time. Everything runs in your browser; audio never leaves your device.

or press Space · stop whenever you like

00:00

now—

median so far—

Your pitch, live the chart compresses as the recording grows

Read this aloud

Results

Profile

▶ Click the chart to play from that point; click near the line to pause. Hover to see the time.

processed detections trimmed outliers EMA MA

Analysis settings

Changing anything below switches the profile to Custom — your own preset.

points EMA MA

Outlier trimming Percentile modes cut both edges of the whole recording. Smart removes brief, low-confidence jumps using nearby speech while preserving clear pitch changes.

Sensitivity 0.55 Pitch-confidence threshold. Lower catches more quiet sounds and noise; higher keeps only clear tone.

MA window 72 ms How much time the centred moving average smooths over.

EMA span 72 ms Exponential smoothing span. Smaller reacts faster; larger is smoother.

Octave correction Fixes brief false 2× jumps when the detector confuses an octave.

Min duration 3 Drops voiced bursts shorter than N frames — usually clicks, breaths, or artifacts.

Filter steady background tones Removes quiet, persistent pitch detections while preserving louder speech and clear sustained notes.

Recording

↓ Download WAV

History

Your last 30 recordings are stored locally in this browser (up to 1 GB); older ones are removed automatically. Export downloads the pitch contours as JSON.

Free browser-based pitch analysis

Measure your speaking voice in hertz, notes, and time

VoiceScope is a free online voice pitch analyzer for speech and singing. It records from your microphone, estimates fundamental frequency (F0), and turns each voiced moment into a frequency, musical note, and readable pitch contour. Processing stays in your browser.

VoiceScope pitch contour showing detected notes and frequency across a recording — A full contour keeps the timing and shape of the recording visible instead of reducing the voice to one number.

What a voice pitch analyzer measures

Pitch is the perceptual counterpart of fundamental frequency: how quickly the vocal folds repeat a vibration. VoiceScope reports that estimate in hertz and maps it to the nearest equal-tempered note. Median pitch describes the centre of a recording, while the contour shows changes that a single average cannot reveal.

How to get a reliable voice frequency result

Use a quiet room and keep the microphone about 10–20 cm from your mouth.
Speak naturally for at least 15 seconds instead of forcing an unusually low or high voice.
Repeat the recording and compare medians; background noise and vocal warm-up can shift a result.
Use Smart mode when clicks, breaths, or short background sounds create isolated pitch points.

Why VoiceScope keeps the full pitch contour

A short voice test often returns one number. VoiceScope also keeps the underlying time series, highlights trimmed outliers, lets you replay the exact recording, and stores recent sessions locally for comparison. That makes it useful for checking speaking pitch, vocal exercises, intonation, and detector errors rather than treating one number as a verdict.

Before and after diagram of Smart filtering removing a short low-confidence pitch spike — Smart mode uses local context and detector confidence to remove a brief glitch while preserving the surrounding phrase.

Privacy and limits

Microphone analysis and recording history run locally on your device. VoiceScope measures F0, not attractiveness, health, gender, resonance, or the complete character of a voice. Results are a statistical and acoustic reference, not a medical diagnosis.

Common questions

What is the normal frequency of a speaking voice?

Speaking F0 varies by person, age, physiology, language, emotion, and context. A range is more useful than a hard category. VoiceScope shows a descriptive statistical reference while keeping the raw recording available for review.

Does VoiceScope upload my microphone audio?

No application server receives the recording. Analysis and history use browser APIs and local IndexedDB storage. An optional anonymous GoatCounter page-view request is separate from microphone processing.

Can it detect singing notes?

Yes. A steady sung note normally produces a clear note and frequency. The tool is designed around voice F0 rather than instrument tuning, so it does not display cents deviation from concert pitch.

Why do some points disappear in Smart mode?

Smart mode looks for short, locally inconsistent points with weak detector confidence. Sustained changes and clear short phrases are retained; isolated low-confidence glitches are marked as trimmed.