Ear Training: Hear What's Playing · Lesson 7 of 12 · 12 min

Major or minor? Hear the middle note

Tell a major chord from a minor one by listening for the one note that differs, the middle note, instead of guessing from the mood of the song.

Watch: Major or minor: listen to the middle

WHERE TO LISTEN

Only the middle note moves

A three-note chord (a triad) stacks a root, a third and a fifth. In both major and minor, the root and the fifth are 7 half steps apart. A half step is the distance from one key to the very next key on the keyboard. The only thing that changes is the middle note, the third: 4 half steps above the root in major, 3 in minor.

C major: C–E–G, gaps 4 + 3. C minor: C–E♭–G, gaps 3 + 4. A minor: A–C–E, gaps 3 + 4. The outer notes never tell you which one you have.

What most listeners report

Major · C E G

Middle note E, 4 half steps above C. Most people describe it as bright, open, settled. It is a common impression, not a rule of emotion.

Minor · C E♭ G

Middle note E♭, 3 half steps above C. Most people describe it as darker, softer, more inward. Same outer notes; the middle slid down one half step.

Check yourself

Leila's teacher plays two chords. Both have C at the bottom and G at the top, but one sounds brighter. Leila wants to know which is major. Where should she focus her ear?

On the bottom note, because it names the chord
On the top note, because it is the easiest to hear
On the middle note, the only one that differs
On which chord was played louder

Show the answer

On the middle note, the only one that differs

Right. C and G are shared by C major and C minor. Only the middle note, E or E♭, carries the difference.

Sing your way to the answer

Hum the lowest note
Let the chord ring and hum the bottom note. In simple songs that is usually the root.
Find the middle note
Slide your voice up from the root until you land on a note inside the chord that is not the top one. That is the third.
Compare with the major version
From the same root, sing the major pattern: root, up 4 half steps, up 3 more (C, E, G). If the chord's middle note sits exactly where yours did, it is major. If it sits a half step lower, it is minor.
Check against the whole chord
Play or imagine both versions one after the other. The one that matches what you heard is your answer.

A minor and A major, counted in half steps from A.

note:        A  A♯ B  C  C♯ D  D♯ E
half steps:  0  1  2  3  4  5  6  7

A minor:     A        C           E    (0, 3, 7)
A major:     A           C♯       E    (0, 4, 7)

Output

Same A, same E. Middle note C (3) = minor. Middle note C♯ (4) = major.

The two chords differ by one key on the keyboard, and that key is always the middle one.

Check yourself

Kian plays A–C–E, then raises only the middle note by one half step, to C♯. He has turned A minor into A major.

Show the answer

True

True. A to C is 3 half steps (minor third); A to C♯ is 4 (major third). The root A and the fifth E stay put, so raising the middle note is exactly the move from minor to major.

Check yourself

Does this clue tell you whether a chord is major or minor?

The middle note is 4 half steps above the root
The song is fast and danceable
The middle note is 3 half steps above the root
It is played on a violin
Your sung major pattern lands a half step above the chord's middle note
The singer sounds sad

Show the answer

Real clue: The middle note is 4 half steps above the root, The middle note is 3 half steps above the root, Your sung major pattern lands a half step above the chord's middle note

Not a clue: The song is fast and danceable, It is played on a violin, The singer sounds sad

A two-minute daily drill

Play C–E–G, then C–E♭–G, and sing the middle note of each out loud.
Do the same from A: A–C♯–E, then A–C–E.
Then ask someone (or a shuffled app) to play one of the pair while you look away, and name it by its middle note.
Say what you heard as 'middle note high = major, a half step lower = minor', not 'happy' or 'sad'.

Check yourself

Match what you notice to what it tells you

Show the answer

Middle note 4 half steps above the root → Major
Middle note 3 half steps above the root → Minor
Root and top note 7 half steps apart → True of both major and minor
The song is slow and quiet → Nothing yet about the chord

Check yourself

Hana hears a guitarist strum a chord in a slow, sad-sounding song. She hums the root, then sings the major pattern from it, and the chord's middle note matches her major third exactly. What is the chord?

Minor, because the song sounds sad
Major: its middle note is the major third
She can't tell without seeing the guitar
Minor, because guitars make chords sound darker

Show the answer

Major: its middle note is the major third

Yes. The middle note sitting 4 half steps above the root makes it major, whatever the tempo or mood of the song around it.

Lesson recap

Major and minor triads share the root and the fifth (7 half steps apart); only the middle note differs.
Major = gaps 4 + 3 (C–E–G). Minor = gaps 3 + 4 (C–E♭–G, A–C–E).
To hear it, hum the root, sing the major pattern, and check whether the chord's middle note matches or sits a half step lower.
Bright versus dark is a common impression; tempo, loudness and instrument tell you nothing about the chord.

Keep it, don't just read it

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