LilyPond Internals Reference: 2.2.45 Grace_beam_engraver

### 2.2.45 Grace_beam_engraver

Handle `Beam` events by engraving beams. If omitted, then notes are printed with flags instead of beams. Only engraves beams when we are at grace points in time.

Music types accepted:

beam-event

Properties (read)

> `baseMoment` (moment)

>   Smallest unit of time that will stand on its own as a subdivided section.

> `beamMelismaBusy` (boolean)

>   Signal if a beam is present.

> `beatStructure` (list)

>   List of `baseMoment`s that are combined to make beats.

> `subdivideBeams` (boolean)

>   If set, multiple beams will be subdivided at `baseMoment` positions by only drawing one beam over the beat.

This engraver creates the following layout object(s):

Beam.

`Grace_beam_engraver` is part of the following context(s): CueVoice, DrumVoice, GregorianTranscriptionVoice, MensuralVoice, TabVoice, VaticanaVoice and Voice.

#### Internals Reference