Instruments, Keyboard
& Grand Staff
See how octaves appear on different instruments, explore the keyboard layout, and trace two octaves across the bass and treble clefs.
Instruments
The Octave on Different Instruments
Every instrument expresses octaves differently, but the principle remains the same.
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Piano
An octave spans 8 white keys. A standard piano has just over 7 octaves.
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Guitar
The 12th fret produces a note one octave above the open string.
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Voice
Most untrained voices cover 1.5–2 octaves. Trained singers may reach 3+.
Visual
One Octave on the Keyboard
From one C to the next C — 8 white keys, 5 black keys, 12 semitones total.
C4 to C5 — One Complete Octave
Grand Staff
Two Octaves — C3 to C5
Notes span from the bass clef through middle C and up into the treble clef.