Music notation glossary · Intervals
Octave
twelve semitones
In the score
What it means
The same note one register higher — the frequency doubles. That is why both carry the same name, and why note names repeat after seven steps.
Related pages
Anotona does this for you
Photograph a page of sheet music or play the melody — Anotona finds the key, engraves the notes and transposes them into any other. Free.
See AnotonaEvery note on this page is computed, not typed in — following the rule that also makes F# major spell its seventh degree E#, not F.