Pitch in music is how high or low a sound is. It is set by frequency: the faster a string, vocal fold or air column vibrates, the higher the pitch. Frequency is measured in hertz (Hz), and the A above middle C vibrates 440 times per second. To hear pitch change, shift any song with the online pitch changer.
Pitch meaning in music: a simple definition
Pitch lets you call one sound higher or lower than another. A tuba plays low pitches, a flute high ones; a melody is a sequence of pitches in time. When a test asks which element of music describes how high or low a sound is, the answer is pitch.
Pitch belongs to sounds with a steady, repeating vibration. Instruments that produce one clear pitch, such as the piano, violin or voice, have definite pitch. Snare drums and cymbals make a noise-like sound without one clear pitch (indefinite or unpitched). Acousticians call pitch a perceptual property of sound: it is what your ear and brain make of the frequency.
Pitch vs frequency
Frequency is physical: the number of vibrations per second, measured in hertz. Pitch is what you hear. The two move together, but not in a straight line: each time the frequency doubles, the pitch rises by the same step, one octave. That is why 110 → 220 Hz and 440 → 880 Hz sound like the same jump.
Most musical sounds also contain overtones, yet you hear one pitch, set by the lowest repeating vibration (the fundamental). Overtones change the tone colour, not the pitch.
What determines pitch?
Pitch is determined by the frequency of the vibration, and the frequency depends on the object that vibrates:
- Strings (guitar, violin, piano): shorter, tighter or thinner strings vibrate faster and sound higher. Pressing a guitar string at the 12th fret halves its length and raises it one octave.
- Air columns (flute, trumpet, organ pipes): a shorter tube gives a higher pitch; opening finger holes shortens the column.
- Voices: the vocal folds stretch and thin to sing higher and shorten and thicken to sing lower.
- Recordings: playing a recording faster raises every pitch; pitch-shifting software changes the pitch without changing the speed.
What is pitch measured in?
Pitch is described in three ways: frequency in hertz (A4 = 440 Hz), note names with octave numbers (A4, C5), and distances in semitones and cents. One semitone is 100 cents, and 12 semitones make one octave.
High pitch vs low pitch: examples
A high pitch sounds bright or thin (a whistle, a piccolo); a low pitch sounds deep or heavy (a bass guitar, a tuba). Pitch is not loudness: a flute note can be high and quiet, a kick drum low and loud.
| Note | Frequency | Semitones from A4 | Where you hear it |
|---|---|---|---|
| A0 | 27.50 Hz | −48 | Lowest key of an 88-key piano |
| E1 | 41.20 Hz | −41 | Lowest string of a 4-string bass guitar |
| E2 | 82.41 Hz | −29 | Lowest string of a guitar in standard tuning |
| C3 | 130.81 Hz | −21 | One octave below middle C |
| C4 | 261.63 Hz | −9 | Middle C |
| A4 | 440.00 Hz | 0 | Tuning note (concert pitch) |
| C5 | 523.25 Hz | +3 | Tenor high C |
| A5 | 880.00 Hz | +12 | One octave above A4 |
| C6 | 1,046.50 Hz | +15 | Soprano high C |
| C8 | 4,186.01 Hz | +39 | Highest key of an 88-key piano |
The lowest and highest pitches in most music sit at the ends of the piano: A0 (27.5 Hz) and C8 (about 4,186 Hz).
Types and levels of pitch
- High, middle and low pitch (pitch levels or registers): the same melody can be sung low, in the middle or high.
- Absolute (perfect) pitch is naming a note without a reference; relative pitch is judging notes by their distance from another note, the skill most trained musicians use.
- Concert pitch: the shared tuning standard, A4 = 440 Hz. Some orchestras tune to 442 Hz, and some musicians prefer 432 Hz.
- Written vs sounding pitch: on transposing instruments such as the B♭ clarinet, a written C sounds as the B♭ below it.
Pitch, notes and octaves
A note is the name or symbol; the pitch is the actual sound height. Twelve pitch names repeat in every octave: C, C♯/D♭, D, D♯/E♭, E, F, F♯/G♭, G, G♯/A♭, A, A♯/B♭ and B. Because an octave doubles the frequency, A2 (110 Hz), A3 (220 Hz) and A4 (440 Hz) share a name and sound related, but they are three different pitches.
Sharps and flats: how a change in pitch is written
In written music a change in pitch is shown by accidentals. A sharp (♯) raises a note by one semitone, a flat (♭) lowers it by one semitone, and a natural (♮) cancels either. So B♭ is one semitone below B, and F♯ one semitone above F. A key signature applies the same sharps or flats to a whole piece; the music key chart lists them for every key.
How pitch changes are measured: semitones and cents
Every semitone multiplies the frequency by 21/12 ≈ 1.0595, a rise of about 5.95 %. The table shows what that means for A4 = 440 Hz and, for comparison, how fast a record or tape would have to play to reach the same pitch the old way.
| Semitones | Frequency ratio | Cents | A4 (440 Hz) becomes | Record speed for the same pitch |
|---|---|---|---|---|
| −12 | ×0.5000 | −1200 | 220.00 Hz | 50.0 % |
| −7 | ×0.6674 | −700 | 293.66 Hz | 66.7 % |
| −5 | ×0.7492 | −500 | 329.63 Hz | 74.9 % |
| −2 | ×0.8909 | −200 | 392.00 Hz | 89.1 % |
| −1 | ×0.9439 | −100 | 415.30 Hz | 94.4 % |
| +1 | ×1.0595 | +100 | 466.16 Hz | 105.9 % |
| +2 | ×1.1225 | +200 | 493.88 Hz | 112.2 % |
| +3 | ×1.1892 | +300 | 523.25 Hz | 118.9 % |
| +5 | ×1.3348 | +500 | 587.33 Hz | 133.5 % |
| +7 | ×1.4983 | +700 | 659.26 Hz | 149.8 % |
| +12 | ×2.0000 | +1200 | 880.00 Hz | 200.0 % |
Our tools use this math directly. In our pitch shifter tests (11 exports of a 440 Hz tone from −24 to +24 semitones, with cents), the worst pitch error was 0.1 cent and the length did not change; how our tools are tested explains the method. To convert any interval, use the semitone calculator; the basics are in what semitones are.
What “pitched up” and “pitched down” mean
A track that is pitched up has every frequency raised; pitched down means lowered. On tape and vinyl the only way was to change the speed, so +2 semitones also meant about 12 % faster, the “chipmunk” effect. Modern pitch shifting separates the two: a pitch shifter moves the pitch and keeps the tempo, which is how you change pitch without changing speed. If you want both to move together like a record, use the pitch and tempo changer.
Pitch vs tempo, key, tone and volume
| Term | What it describes | Measured in | Example |
|---|---|---|---|
| Pitch | How high or low one sound is | Hz, note names, semitones | A4 = 440 Hz |
| Tempo | How fast the music moves | Beats per minute (BPM) | 120 BPM |
| Key | The home note and scale of a song | Key name | G major, A minor |
| Tone (timbre) | The colour of a sound | Overtones (described, not one number) | Piano and violin both playing A4 |
| Volume (loudness) | How strong a sound is | Decibels (dB) | A quiet high note vs a loud low note |
| Melody | A sequence of pitches in time | Notes and rhythm | The tune you hum |
Tempo and pitch are independent: a song can be slow and high or fast and low, as pitch vs tempo shows in detail. Key sits one level above pitch: moving every pitch by the same number of semitones changes the key, explained in key change vs pitch change.
Pitch in singing
In singing, pitch means hitting the target frequency of each note. A singer slightly above it is sharp, slightly below is flat, and a performance that drifts in and out of tune is called pitchy. Causes and fixes are covered in common pitch problems for singers.
Your pitch range (vocal range) is the span from your lowest to your highest comfortable note, about A2 to A4 for a typical baritone. Measure yours with the vocal range test, compare voice types on the vocal ranges page, and if a song sits too high or too low, move its key with the online key changer. For a voice recording rather than a song, the voice pitch changer shifts speech or singing.
How to find and change the pitch of a song
- Find the song’s key with the song key finder.
- Compare the highest note of the song with the top of your range.
- Count the semitones you need: how many semitones to change key gives the number for every key pair.
- Shift the song by that number of semitones, keep the tempo, preview and download.
Worked example: a song in E major peaks on B4, but your comfortable top note is A4. That is 2 semitones too high. Shift it by −2 semitones: E major becomes D major, the top note falls from B4 to A4 (493.88 → 440.00 Hz), and the tempo stays the same.
Frequently asked questions
What is pitch in music in simple terms?
Pitch is how high or low a sound is. A whistle has a high pitch and a tuba a low one; the faster something vibrates, the higher its pitch.
What is pitch determined by?
By the frequency of the vibration, in hertz. That depends on the length, tension and thickness of a string, the length of an air column, or the tension of the vocal folds.
Is pitch the same as a note?
No. A note is the name (A, C♯) or the symbol on the staff; pitch is the sound height. The note A exists in every octave (110, 220, 440 and 880 Hz), and each is a different pitch.
Is pitch the same as tempo or key?
No. Tempo is speed in BPM, and key is the set of pitches a song is built on. You can change pitch without changing tempo, and moving every pitch by the same amount changes the key.
Why is pitch important in music?
Pitch creates melody and harmony, and for singers it decides whether a song is comfortable: a key 2 or 3 semitones too high causes strain, so singers move the track into their key.
Can pitch be changed digitally?
Yes. Pitch-shifting software raises or lowers pitch in semitones and cents while keeping the tempo. Our browser tools do it on your device, with no upload.
More guides on keys, semitones and singing are collected on the pitch and key guides page.