### 3.2.114 stem-tremolo-interface

A beam slashing a stem to indicate a tremolo. The property `style` can be `default` or `rectangle`.

#### User settable properties:

> `beam-thickness` (dimension, in staff space)

>   Beam thickness, measured in `staff-space` units.

> `beam-width` (dimension, in staff space)

>   Width of the tremolo sign.

> `direction` (direction)

>   If `side-axis` is `0` (or `X`), then this property determines whether the object is placed `LEFT`, `CENTER` or `RIGHT` with respect to the other object. Otherwise, it determines whether the object is placed `UP`, `CENTER` or `DOWN`. Numerical values may also be used: `UP`=`1`, `DOWN`=`-1`, `LEFT`=`-1`, `RIGHT`=`1`, `CENTER`=`0`.

> `flag-count` (number)

>   The number of tremolo beams.

> `length-fraction` (number)

>   Multiplier for lengths. Used for determining ledger lines and stem lengths.

> `style` (symbol)

>   This setting determines in what style a grob is typeset. Valid choices depend on the `stencil` callback reading this property.

> `slope` (number)

>   The slope of this object.

#### Internal properties:

> `stem` (graphical (layout) object)

>   A pointer to a `Stem` object.

This grob interface is used in the following graphical object(s): StemTremolo.

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