Free Online Tool
Voice Pitch Analyzer
Sing or speak into your microphone and watch your pitch curve draw in real time. Use the recording feature to compare your live voice against a previous take — great for identifying intonation drift.
Select your voice type
My instrument is tuned to…
Click or press keyboard keys to play
Related Free Music Tools
How to use
- 1
Select your voice type for octave-accurate readings.
- 2
Click Start Detection and sing or speak.
- 3
Hit Record before a phrase, then Stop Recording to lock the orange reference curve.
- 4
Sing again to compare your live (blue) pitch against the recorded (orange) reference.
What Is a Vocal Pitch Monitor?
A vocal pitch monitor — also called a voice pitch analyzer or audio pitch detector — displays your singing pitch in real time as a scrolling graph. Every point on the curve is the fundamental frequency (in Hz) your voice produced at that moment. As you sing, the curve scrolls right, leaving a visual trail of every note and pitch transition you made.
Pitch curves are used by vocal coaches, recording engineers, and music production software such as Auto-Tune and Melodyne to visualize intonation. This free online voice pitch analyzer brings the same visualization to your browser — works as an online mic test for pitch with no software install required.
A flat horizontal line means a perfectly held note. A gentle wave is natural vibrato. A rapid zigzag can mean unstable pitch, excessive ornamentation, or background noise interfering with detection. Once you can see your pitch curve, problems that were previously invisible become immediately obvious.
Live vs. Recording Comparison: Why It Matters
Most singers have a gap between how they think they sound and how they actually sound. The comparison feature makes that gap measurable. Record a phrase as your reference (orange curve), then sing the same phrase again. The live (blue) curve overlays the reference so you can see exactly which notes went sharp or flat and where your pitch drifted between the two takes.
This is particularly useful for learning difficult melodic runs, checking whether your vibrato center is on pitch, and building consistent intonation across multiple takes in a recording session.
What Different Pitch Curves Mean
Learning to read your vocal pitch monitor curve is as important as generating one. Here are the four most common patterns and what each one tells you about your singing.
Perfectly sustained note
Flat horizontal line
The ideal on long tones and held notes. Your breath support is consistent and your vocal folds are vibrating at a stable frequency. Aim for this when practicing sustain exercises.
Natural vibrato
Gentle sine wave
A smooth, regular wave at 5–7 Hz with consistent depth (±50 cents or less) is healthy vibrato. If the wave is irregular or wider than ±1 semitone, the vibrato needs centering work.
Phrase-end flat
Downward slope at end
The most common intonation problem. Pitch drops as breath pressure decreases toward the end of a phrase. The fix: engage your support muscles fully through the final note, don't let go early.
Unstable pitch
Rapid zigzag
Rapid irregular fluctuations indicate throat tension, a register break crossing, or background noise affecting detection. Relax your jaw and tongue, reduce room noise, and move closer to the mic.
How to Improve Your Intonation
Slow down problem passages.
If your curve shows consistent flat intonation on a specific interval, isolate it and sing at half tempo while watching the curve. Target the green zone on each landing note to build accurate muscle memory.
Record your ideal take as a reference.
On a good day, record your best attempt at a phrase. On subsequent days compare new takes to the reference curve to track whether intonation is improving, regressing, or holding steady.
Address phrase-end flat notes.
Most singers go flat at the end of long phrases as breath support drops. The scrolling curve makes this immediately visible as a downward slope on the phrase-final note. Focus on maintaining support through the full phrase.
Check your passaggio transitions.
The break between chest and head voice is the most common source of pitch instability. Watch your curve during passages crossing your break to see which direction pitch shifts and by how many cents.
How the Pitch Curve Is Generated
The analyzer samples your microphone via the Web Audio API at 44100 Hz and feeds overlapping audio frames into the YIN pitch estimator. Each frame produces a frequency estimate plotted as a point on the canvas. The canvas scrolls left to create the continuous curve. An EMA smoother reduces frame-to-frame jitter, updating at roughly 60 times per second for a smooth, low-latency visualization.
Frequently Asked Questions
A vocal pitch monitor displays your singing pitch in real time as a scrolling graph, letting you watch your intonation while you practice. This free voice pitch analyzer works as a vocal pitch monitor in your browser — open the page, allow mic access, and start singing.
A guitar tuner checks whether a specific note is in tune — pass/fail for a target pitch. A voice pitch analyzer shows a continuous pitch curve over time across all notes, letting you see your full intonation history, vibrato shape, and phrase-level pitch drift. It is designed for singers and vocal coaches.
Open this free voice pitch analyzer in any modern browser, allow microphone access, and start singing. The tool displays your real-time pitch curve, current note name, frequency in Hz, and cents deviation — all processed locally in your browser with no audio uploaded to any server.
A flat horizontal curve means you are sustaining a note at a consistent pitch — the ideal on long tones. A downward slope at phrase end usually means breath support is dropping, causing the note to go flat. A wavy curve is vibrato; a rapid zigzag suggests instability or background noise.
Yes. The voice pitch analyzer works with any monophonic audio source — voice, violin, flute, guitar, or any single-note instrument. Play into your microphone and the pitch curve tracks the fundamental frequency in real time.
Yes. Singing a note and watching the pitch curve respond is an effective online mic test — if the curve shows a note, your microphone is working correctly. The confidence bar indicates signal strength and helps diagnose mic distance or background noise issues.
Ready to Analyze Your Voice?
Start singing and watch your pitch curve draw in real time — free, private, no app needed.
Open Analyzer