Music Theory · Chapter 1, Lesson 2 — Music Theory 101

The Musical Alphabet A–G

Q: What are the 7 letters of the musical alphabet?

A, B, C, D, E, F, and G. After G, the pattern starts over again at A.

Q: Why does music stop at G instead of continuing to H?

There's no technical reason it couldn't — it's simply the naming convention that stuck. Western music settled on 7 letters, and rather than keep inventing new ones, it loops back to A and climbs an octave higher.

Q: What happens after G?

You land back on A, but a full octave higher — same letter name, same 'color' of pitch, doubled in frequency.

Q: Are letter names enough to name every note on a keyboard?

Not quite — the 7 letters name the white keys. The black keys in between are named using sharps and flats attached to those same letters.

Every pitch in Western music is named with just 7 letters — and then the pattern loops, forever.

Beginner ⏱ 3 min read 🎹 Interactive

Only 7 letters, ever

Music uses just A, B, C, D, E, F, and G to name pitches — no more, no fewer. Whether you're looking at a piano, a guitar, or a page of sheet music, everything traces back to this 7-letter cycle. There's no H; once you reach G, the alphabet simply starts over at A again.

Why it repeats: octaves

When the alphabet loops back to A, it's not the exact same pitch — it's the same letter, one octave higher, vibrating at exactly double the frequency. Our ears hear notes an octave apart as "the same note, just higher," which is why they share a name. So the full pattern isn't really A→G and stop — it's A B C D E F G A B C D E F G, climbing upward for as long as the instrument's range allows.

🎹 The Alphabet, Twice Click any white key, or play the full climb across both octaves.

Octave 3

Octave 4

Same 7 letters, one octave apart

💡 Notice: the white keys spell out the alphabet directly — C D E F G A B — but they don't start the cycle at A. That's a historical quirk: C just happens to be the most common starting point (the "natural" scale with no sharps or flats), even though A technically kicks off the alphabet.

Common questions

What are the 7 letters of the musical alphabet?

A, B, C, D, E, F, and G — then it starts over at A again.

Why does music stop at G instead of continuing to H?

No technical reason — it's just the naming convention Western music settled on.

What happens after G?

You land back on A, a full octave higher — same letter, double the frequency.

Are letter names enough to name every note on a keyboard?

They name the white keys. Black keys use sharps and flats attached to those same 7 letters.

Learn every note by ear and by name

Melody Monkey labels every note live as you play — on guitar, bass, ukulele, or piano.

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Still stuck? Ask Your Personal Music Teacher about The Musical Alphabet A–G →

Only 7 letters, ever

Why it repeats: octaves

Common questions

Learn every note by ear and by name

Keep learning