### 1.1.20 CrescendoEvent

Begin or end a crescendo.

Syntax: note`\<` … note`\!`

An alternative syntax is note`\cr` … note`\endcr`.

Event classes: crescendo-event, music-event, span-dynamic-event, span-event and StreamEvent.

Accepted by: Dynamic_engraver and Dynamic_performer.

Properties:

> `name` (symbol):

>   `'CrescendoEvent`

>   Name of this music object.

> `types` (list):

>   `'(general-music post-event span-event span-dynamic-event crescendo-event event)`

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

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