LilyPond program-reference: 3.2.5 ambitus-interface

### 3.2.5 ambitus-interface

The line between note heads for a pitch range.

#### User settable properties:

> `thickness` (number)

>   Line thickness, generally measured in `line-thickness`.

#### Internal properties:

> `join-heads` (boolean)

>   Whether to join the note heads of an ambitus grob with a vertical line.

> `note-heads` (unknown)

>   A list of note head grobs.

This grob interface is used in the following graphical object(s): Ambitus, AmbitusLine and AmbitusNoteHead.

#### Internals Reference