The musical alphabet

Music in the Western tradition uses just seven letter names for its notes:

A La — B Si — C Do — D Re — E Mi — F Fa — G Sol

After G Sol , the alphabet doesn’t continue to H. It wraps back to A La . The next note sounds higher, but it shares the same name.

That wrapping isn’t arbitrary. It’s a consequence of a deep acoustic fact: when a note vibrates at exactly double the frequency of another, our ears hear them as “the same note, higher.” Doubling is what makes the alphabet loop. We’ll come back to this in the next chapter when we meet the octave.

Why only seven letters?

This is the question every beginner asks, and the honest answer is historical convention. Medieval European musicians named the notes of a scale they used constantly, and seven letters covered every note in that scale. The other sounds we now call “sharps” and “flats” came later — named in relation to those original seven, never given letters of their own.

The takeaway

The musical alphabet is A La B Si C Do D Re E Mi F Fa G Sol , and then it repeats. Every note you will ever play has one of those seven letters as its base name. The “in-between” notes (sharps and flats) are still named after these seven — never with their own letters.

Recap

• Western music uses seven letter names: A, B, C, D, E, F, G.
• After G, the alphabet wraps back to A — the note sounds higher, but shares the same name.
• This wrapping happens because each octave is a doubling of frequency, and our ears hear doubled frequencies as “the same note.”