### 1.1.63 RelativeOctaveCheck

Check if a pitch is in the correct octave.

Properties:

> `name` (symbol):

>   `'RelativeOctaveCheck`

>   Name of this music object.

> `to-relative-callback` (procedure):

>   `ly:relative-octave-check::relative-callback`

>   How to transform a piece of music to relative pitches.

> `types` (list):

>   `'(general-music relative-octave-check)`

>   The types of this music object; determines by what engraver this music expression is processed.

#### Internals Reference v2.18.2 (稳定分支).