# Octaves clefs

Octave clefs are used to write music notes that will sound an octave lower or an octave higher.

- If the symbol
*8*is below the clef, then all the music notes will sound one octave lower. - If the symbol
*8*is above the clef, then all the music notes will sound one octave higher.

Here are some example:

## Octave treble clefs

In this example, all C notes have the same pitch, they are the same sound with the use of octave clefs.

Below are more examples of octave treble clefs:

The example above sound exactly like:

But you can use the symbol *8va* to do the same:

## Examples in famous works

### Chopin, Nocturne opus 9 n°1

Example in *Nocturne n°1 Opus 9* for piano by **Frédéric Chopin** on measure 12 ( bar 12), this royalty free sample was performed by pianist **Samson François** in 1964, Creative Commons Zero 1.0 license, source):

## Octave bass clefs

Octave clef can be used for all clefs, even for the bass clef. Like for the treble clef, here is an example of octave bass clefs:

In this example, all C notes have the same pitch, they are the same sound with the use of octave clefs.

## Other Notations

Here are other symbols to perform music notes one octave lower or one octave higher:

Symbols | Italian | meaning |

8va | Ottava Alta | On octave higher |

8vb | Ottava Bassa | On octave lower |

15ma | Quindicesimo Alta | Two octaves higher |

15mb | Quindicesimo Bassa | Two octave lower |

External links to learn more about :

1 - https://www.dolmetsch.com/musictheory1.htm

2 - https://www.dolmetsch.com/musictheory14.htm

3 - https://en.wikipedia.org/wiki/Clef