Music theory basics · updated 2026-08-16

SEMITONE AND WHOLE TONE

The semitone is the smallest step in Western equal temperament; two semitones make a whole tone. Everything from scales to chord spelling is counted in them.

Music theory basics — Photograph of a printed score of Mozart's Rondo alla Turca open on a music desk, showing staves, key signature and note heads — the written notation this section defines.

Key takeaways

The semitone is the smallest step in Western equal temperament; two semitones make a whole tone.
Everything from scales to chord spelling is counted in them.
A whole tone is two of them.
Transposing a MIDI clip by +1 in your DAW moves it one semitone; +12 moves it one octave.
Watch out: counting from E to F or B to C as a whole tone.

Quick checklist

Can you define semitone and whole tone in one sentence without looking?
Can you point at semitone and whole tone in a real session, mix or contract?
Have you tried the practical move above at least once?
Would you catch the common mistake before it costs you a take?
Have you opened one of the primary sources below rather than a forum thread?

SEMITONE AND WHOLE TONE IN DEPTH

A semitone is the smallest step in standard Western tuning — one fret, one piano key including the black ones. A whole tone is two of them. Scales are described by their pattern of these steps, which is why the major scale can be memorised as tone-tone-semitone-tone-tone-tone-semitone.

How it works in practice

Transposing a MIDI clip by +1 in your DAW moves it one semitone; +12 moves it one octave.

The mistake people make

Counting from E to F or B to C as a whole tone. Those pairs are semitones on the keyboard even though there is no black key between them.

WHERE SEMITONE AND WHOLE TONE SITS

Semitone and whole tone belongs to music theory basics in the Sampled music glossary. The vocabulary you need before anyone can explain a chart, a chord chart, or a session to you.

TERMS THAT DEPEND ON SEMITONE AND WHOLE TONE

Interval
The distance between two pitches, counted in scale steps (a third, a fifth) or in semitones (4, 7).
Cents
A hundredth of a semitone. Tuning software and pitch correction both measure error in cents.
Equal temperament
The tuning system that splits the octave into twelve equal semitones so every key sounds usable, at the cost of pure intervals.

TEST YOURSELF

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3 quick questions on semitone and whole tone. Answers are marked instantly — nothing is sent anywhere.

1. Which statement best describes semitone and whole tone?
2. What is the mistake people most often make with semitone and whole tone?
3. In practice, which of these applies to semitone and whole tone?

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SOURCES AND CITATIONS

Free, primary references for semitone and whole tone — standards bodies, manufacturers, government offices and university course material. Each one lists the line of this entry it backs up.

musictheory.net lessons (opens in a new tab)
Free interactive lessons · musictheory.net
“The semitone is the smallest step in Western equal temperament; two semitones make a whole tone.”— the claim this source supports
Why it counts: Short interactive drills that let you test the concept immediately rather than only read about it.
Open Music Theory (opens in a new tab)
Open textbook · Open Music Theory
“Everything from scales to chord spelling is counted in them.”— the claim this source supports
Why it counts: An openly licensed university textbook, so the definition can be checked against a citable academic source.

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