This knowledge hub collects every PitchDetector.com guide on pitch, frequency, tuning and singing in one place, grouped by topic. Start with the five-step path below, then open any group. Keep the free online pitch detector open in another tab so you can check each idea with your own voice or instrument.
Start here: five guides in order
New to pitch detection? Read these five in order. Together they explain what a detector measures and how to read what it shows.
- How to measure pitch in music: what a measurement is and which tools do it.
- Pitch vs frequency: why the note you hear and the Hz you measure differ.
- Frequency vs note vs octave: how 440 Hz becomes A4.
- What are cents?: 100 cents make one semitone; this is how sharp and flat are measured.
- How to interpret your results: note, Hz, cents and stability, read together.
Choose your path
| You are… | Go to |
|---|---|
| A singer | Singing on pitch, then Ear training |
| An instrument player | Tuning and pitch standards and the instrument charts |
| A student or teacher | Pitch, frequency and notes |
| A producer or audio engineer | Audio files, apps and production |
| Curious about the technology | How pitch detection works |
| Getting odd readings | Accuracy and troubleshooting |
How pitch detection works
A pitch detector looks for the repeating pattern in a sound (its fundamental frequency) and converts it to a note name and a cents offset. These guides explain the methods, why they sometimes disagree and what they can and cannot hear.
- Real-time pitch detection in your browser
How a web page listens to the mic and finds the note live.
- Autocorrelation vs YIN
The two classic time-domain methods compared.
- How FFT works in pitch detection
Frequency analysis, bins and resolution, simply explained.
- Machine learning in pitch detection
What neural pitch trackers do better, and their costs.
- Pitch tracking vs pitch detection
Single readings versus a pitch line over time.
- Can a pitch detector detect notes?
Yes, one note at a time; chords are harder.
- How accurate are pitch detectors?
Typical accuracy in cents and where it breaks down.
- Why tuners show several notes
Harmonics and octave errors explained.
- Our methodology
How PitchDetector.com measures and what its numbers mean.
Accuracy and troubleshooting
Most jumpy or wrong readings come from the signal, not the algorithm: noise, a weak input, clipping or several sounds at once.
- Why are my readings unstable?
Step-by-step fixes for a note that keeps jumping.
- Noise and background interference
Get clean readings in a noisy room.
- Microphone quality and accuracy
Why placement and gain matter more than price.
Audio files, apps and production
Pitch detection is not only for live singing. These guides cover recordings, phones and studio work.
- What is an audio-file pitch detector?
Analyse a recording instead of the microphone.
- Detect pitch in MP3, WAV and M4A
Step by step, with tips for clean results.
- Pitch accuracy testing with recordings
Record, analyse and compare your takes.
- Pitch detection app for iPhone and Android
Use the browser tool on your phone, no download.
- Pitch detection for audio engineers
Precise frequency checks for mixing and sound design.
- How pitch detection helps music production
Tuning vocals, samples and bass lines.
- Pitch detection software for producers
Plug-ins and online tools compared.
- How to read a spectrogram
Time, frequency and loudness in one picture.
Pitch, frequency and notes
Under the standard A4 = 440 Hz, every octave doubles the frequency (A3 = 220 Hz, A5 = 880 Hz) and each semitone is 100 cents. These guides turn that rule into notes, charts and keys.
- Are pitch and frequency the same thing?
Short answer with everyday examples.
- Convert notes to frequency (Hz)
The formula and worked examples.
- Convert frequency (Hz) to notes
Find the note and cents from any Hz value.
- Musical note frequency chart
The frequency of every note, octave by octave.
- Frequency ranges of instruments and voices
Lowest to highest notes, in Hz.
- The science of pitch perception
How the ear and brain hear a note.
- How to find the key of a song
Three methods, no theory needed.
- Glossary of pitch and audio terms
Quick definitions from cents to sample rate.
Tuning and pitch standards
Why is A tuned to 440 Hz, and how do you tune a real instrument with a detector? Start with the standards, then pick your instrument.
- A440 tuning standard explained
Why concert pitch is A = 440 Hz.
- Historical pitch standards
From Baroque A = 415 to modern A = 440.
- 432 Hz vs 440 Hz
What changes and what the claims get wrong.
- Intonation and temperament
Equal temperament, just intonation and why they differ.
- What is intonation in music?
Playing and singing in tune, and how to fix it.
- Guitar tuning guide
Standard, drop D, open G and more.
- Ukulele tuning tips
GCEA with a pitch detector.
- Piano tuning basics
What a detector can check on a piano.
- Violin intonation practice
Train finger placement with live feedback.
- Pitch detection for bass guitar
Reading low strings reliably.
Singing on pitch
Singers use a detector as a mirror: sing, look, adjust. These guides cover accuracy, warm-ups, breath and gear.
- Use a pitch detector for singing
A simple practice routine with live feedback.
- How to improve pitch accuracy
The practical singer's guide.
- Why singers go sharp or flat
Common causes and fixes.
- What is vibrato?
How it works and how to develop it.
- Whistle and high register detection
Reading very high notes correctly.
- Singing warm-up routines
Routines for every voice type.
- 5-minute vocal warm-up
Quick routine for beginners.
- Warm-ups to stay on pitch
Exercises that target tuning.
- Breathing techniques while singing
Support for steadier notes.
- Breath exercises for singers
Daily drills for control.
- Free singing course
A 7-day beginner course.
- Best microphone for singing practice
Home mics that give clean readings.
Ear training
Hearing a pitch comes before singing it. Listen first, answer, then check the screen, so your ear stays in charge.
- Ear training guide
Build relative pitch without perfect pitch.
- Pitch matching games
Game-style drills that train the ear.
Frequencies and sound
Pages on single frequencies and tuning claims, with what science does and does not support.
- 100 Hz
A low hum near G2 (+35 cents): uses and claims.
- 800 Hz
Close to G5 (+35 cents): focus claims checked.
- 852 Hz
Between G♯5 and A5: the Solfeggio claims checked.
- 932 Hz
Almost exactly A♯5: meaning and evidence.
- 963 Hz
Between A♯5 and B5: meaning and evidence.
- 999 Hz
Just above B5 (+20 cents): meaning and evidence.
- Best frequency for music
Tuning, hearing and so-called healing tones.
Lessons and practice routines
Choosing a teacher or a course, what lessons cost, and simple daily routines for singers and beginner guitarists. Use the free tools between lessons to check what you practise.
- Beginner vocal lessons
How to start singing lessons as a beginner.
- Adult singing lessons online
Learning to sing as an adult: what works.
- Best online singing lessons
Online courses compared.
- 30 Day Singer review
One popular course, reviewed.
- Cost of singing lessons
Typical prices and how to budget.
- Beginner guitar warm-ups
Five-minute finger warm-ups.
- Beginner guitar practice routine
A daily plan for new players.
- Who uses pitch detection
Use cases for singers, teachers, musicians and engineers.
More hubs
- Vocal range hub
Every vocal range guide, chart and test.
- Music charts
Fingering, note and tuning charts by instrument.
- All free tools
Detectors, tuners, converters and trainers.
- Ear training hub
Interval, pitch matching and listening practice.
- Instrument tuning hub
Tuners and tuning guides for every instrument.
FAQ
Where should a beginner start?
With the five-step path above. It takes about 30 minutes and covers everything the tools display.
Are these guides free?
Yes. All guides and tools are free, with no account. Microphone audio is analysed in your browser and not uploaded.
How are the guides checked?
We check technical claims against sources, separate measured results from estimates, and update guides when the tools change. Spotted an error? Email support@pitchdetector.com.