Free Online Pitch Detector
Real-time pitch detection with voice type awareness. Fix the octave error problem — designed for singers.
Select your voice type
My instrument is tuned to…
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Related Free Music Tools
Voice-Aware Detection
Select your voice type (Soprano, Alto, Tenor, Bass) and get accurate octave identification — no more reading C3 when you sing C4.
Stable High-Note Reading
Confidence indicator shows signal reliability. In high register, you see a clear stability gauge — not a jittering needle.
Live vs Recording Compare
See your real-time pitch curve alongside your recorded playback curve on the same screen to spot intonation drift instantly.
How the Pitch Detector Works
- 1.
Grant Mic Access
Click Start Detection and allow your browser to access your microphone. No audio is ever sent to any server — all processing happens locally inside your browser using the Web Audio API. Your voice stays completely private.
- 2.
Select Your Voice Type
Choose your voice category — Soprano, Mezzo, Alto, Tenor, Baritone, or Bass. This tells the pitch detection algorithm which octave range to prefer, eliminating the octave-error problem that plagues generic pitch detectors when used by singers.
- 3.
Sing or Play
As you sing, speak, or play an instrument, the pitch detector shows the note name (e.g. A4, C#5), its frequency in Hz, and how many cents sharp or flat you are from perfect tuning. The pitch curve scrolls live on screen so you can track your intonation history at a glance.
Supported Voice Types & Ranges
Most pitch detectors treat all voices the same, causing male voices to read one octave too low and high sopranos to be misidentified in the break register. Our free online pitch detector uses voice-type priors so each singer gets the correct octave every time — no manual octave shifting required.
Soprano
F3 – G5
The highest female voice. Common in classical opera, choral music, and contemporary pop. Sopranos frequently trigger octave errors in generic tuners — our voice-aware mode locks to the correct octave.
Mezzo-Soprano
E3 – F5
A rich, middle female voice — statistically the most common female voice type. The mezzo range bridges the chest and head registers, making accurate octave detection especially important.
Alto
D3 – E5
The lowest female voice, prized for its warm, full chest register. Alto singers often overlap with the tenor range, so voice-type selection prevents misidentification.
Tenor
C3 – C5
The highest common male voice. Central to opera, pop, and choral music. Without voice-type awareness, tenor high notes are frequently read as alto notes by standard pitch detectors.
Baritone
A2 – A4
The most common male voice — powerful mid-range with a characteristically dark timbre. Baritones benefit most from our confidence indicator when pushing into their upper passaggio.
Bass
E2 – E4
The lowest male voice, prized for its depth and resonance. Sub-bass frequencies can challenge standard autocorrelation algorithms — our YIN-based engine handles them reliably.
Who Uses This Pitch Detector?
Singers & Vocal Students
Get instant feedback on every note you produce. Use the cents gauge to build muscle memory for precise intonation. Record a reference phrase, then sing again and compare your live pitch curve to the orange reference line — a fast, visual way to identify exactly where your pitch drifts.
Vocal Coaches & Music Teachers
Show students their real-time pitch curve on a shared screen during lessons. The confidence indicator makes it easy to spot unstable high notes and guide students toward better breath support and resonance. No software installation required — just open a browser tab.
Choir Directors & Section Leaders
Use the singing note detector to verify section pitch accuracy in rehearsal. Assign voice parts accurately using the vocal range test — determine who is a true Alto versus a low Mezzo-Soprano in minutes.
Instrumentalists & Ear Trainers
Whether you play violin, flute, or trombone, our pitch detector reads monophonic input with high accuracy. Use it for instrument tuning, ear-training exercises, and interval recognition practice — all without installing any additional software or apps.
YIN Pitch Detection Algorithm
Our pitch detector is powered by the YIN algorithm — one of the most robust monophonic pitch estimation methods available, developed by de Cheveigné & Kawahara (2002). YIN uses an autocorrelation-based approach combined with a Cumulative Mean Normalized Difference function, making it resilient to noise and harmonics. We add an Exponential Moving Average smoother on top to reduce perceptual jitter without introducing perceptible latency.
100% Private — No Upload, No Account
All audio processing runs inside your browser using the Web Audio API. Your microphone signal never leaves your device. We do not record, store, or transmit any audio data to any server. No account creation is required — open the page and start detecting immediately. The tool continues to work entirely offline once the page has loaded. Your privacy is guaranteed by design.
Frequently Asked Questions
A pitch detector listens to a sound through your microphone and identifies the musical note being produced — including the note name (e.g. A4), its frequency in Hz, and how many cents sharp or flat it is from perfect tuning.
Most pitch detectors don't account for voice type, causing male voices to read one octave too low. Select your voice type (Soprano to Bass) so the algorithm uses the correct frequency range and gives accurate octave readings every time.
No. All processing happens locally in your browser using the Web Audio API. No audio data is ever uploaded or stored. Your microphone signal never leaves your device.
Yes. The pitch detector works with any monophonic sound source — voice, guitar, violin, flute, and more. Play each string individually and the tool shows the note name and cents deviation so you can tune to pitch.
Frequency is the physical measurement of sound vibrations per second (Hz). Pitch is the musical label we assign to a frequency — for example, A4 = 440 Hz. Our pitch detector shows both values simultaneously.
Yes. The tool is fully responsive and works on iOS (Safari) and Android (Chrome). No app download is required — just open the page in your browser.
An octave detector is a pitch detection tool that correctly identifies which octave a note belongs to — not just the note letter (e.g. C), but the full note name including octave number (e.g. C3 vs C4 vs C5). Most pitch detectors fail at octave detection for singers because they apply a single frequency search range to all voices. This free online pitch detector solves the problem by letting you select your voice type first, making it a true octave detector for Soprano through Bass.
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Free, private, and instant — no app, no account. Start detecting pitch right in your browser.
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