Voice Pitch & Range Analyzer

Knowledge Base

How Pitch Detection Works Here

This tool uses autocorrelation, comparing your voice's waveform against a time-shifted copy of itself to find the delay (lag) where they match most closely. That lag directly corresponds to the period of your voice's fundamental frequency, which converts to pitch and then to the nearest musical note. Unlike a simple frequency-domain peak (which can be confused by harmonics), autocorrelation reliably tracks the true fundamental of a sung or spoken note.

Using This for Range Testing

Sing or speak comfortably across your full range, from your lowest chest voice note to your highest falsetto or head voice note, while watching the range bar build. This is a practical, informal range check. A vocal coach's assessment considers tone quality and comfort at the extremes too, not just raw pitch reached.

Useful For

• Voice actors checking their natural speaking pitch range for casting notes.
• Singers warming up and tracking range expansion over time.
• Anyone curious what note their speaking voice naturally sits at.

FAQ

Q: Why does the note jump around on sustained notes sometimes?
A: Natural vibrato, breath noise, or background sound can all cause brief detection jitter. A steady, sustained tone in a quiet room gives the cleanest reading.

Q: Does this work for detecting pitch in music, not just voice?
A: It works on any single melodic line with a clear fundamental frequency, but is tuned and tested primarily for the vocal range, polyphonic (multiple notes at once) audio will not track reliably.

Reading your range and using it

Autocorrelation finds pitch by comparing the waveform against a delayed copy of itself and looking for the delay where the two line up best. That delay is the length of one cycle, and the pitch follows from it. The method is reliable on a single sustained voice and unreliable on anything with two pitches at once, so analyse one person at a time in a reasonably quiet room.

Speaking pitch and singing range are different measurements. Most people speak within a span of about five notes and can sing considerably wider. For voice work the useful figure is where your comfortable speaking pitch sits, because that is the pitch you will hold for an hour without strain. Pushing a presenting voice below its natural resting pitch, which people do when trying to sound authoritative, produces vocal fry and fatigue within minutes.

Track the low end of your range across a session rather than in a single reading. A voice warms up, and the lowest note available after twenty minutes of speaking is usually lower than the one available cold. If your range narrows over a session rather than widening, you are pushing too hard, and that is worth noticing before it becomes a problem.

For recorded work, knowing your fundamental frequency tells you which part of the spectrum carries your voice. A typical adult male voice has a fundamental around 85 to 155 hertz and a typical adult female voice around 165 to 255. High pass filtering below your own fundamental removes rumble without thinning the voice, and setting that filter by measurement rather than by habit avoids cutting into the body of the sound.

Vocabulary

Pitch. How high or low a sound is perceived to be, determined by how fast the waveform repeats. Measured in hertz, or named as a musical note. Distinct from loudness, which is about level rather than speed.

Fundamental frequency. The lowest and strongest frequency in a voice, the one your ear reads as the pitch. Everything above it is harmonics, which shape the character of the voice without changing which note it is.

Autocorrelation. A method of finding pitch by comparing a waveform with a time-shifted copy of itself. The shift producing the closest match equals one cycle. Reliable on a single voice, confused by two sounding at once.

Vocal fry. The creaky, rattling sound a voice makes at the very bottom of its range, where the vocal folds vibrate irregularly. Common when speakers push their pitch lower than is comfortable, and tiring for both speaker and listener.