Next: Setting automatic beam behavior, Up: Beams
By default, beams are inserted automatically:
\time 2/4 c8 c c c \time 6/8 c c c c8. c16 c8
If these automatic decisions are not satisfactory, beaming can be
entered explicitly; see Manual beams. It is also possible
to define beaming patterns that differ from the defaults. The
default beaming rules for most common time signatures are defined
in scm/auto-beam.scm. If there are no beaming rules
defined for a particular beam's duration in the time signature being
used, its beaming is controlled by the values of three context
properties, measureLength
, beatLength
and
beatGrouping
. Both the beaming rules and the context
properties can be overridden, see Setting automatic beam behavior.
Note: If beams are used to indicate melismata in songs, then automatic
beaming should be switched off with autoBeamOff and the beams
indicated manually.
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Automatic beaming may be turned off and on with
\autoBeamOff
and \autoBeamOn
commands:
c4 c8 c8. c16 c8. c16 c8 \autoBeamOff c4 c8 c8. c16 c8. \autoBeamOn c16 c8
\autoBeamOff
,
\autoBeamOn
.
Line breaks are normally forbidden when beams cross bar lines. This behavior can be changed as shown:
\relative c'' { \override Beam #'breakable = ##t c8 c[ c] c[ c] c[ c] c[ \break c8] c[ c] c[ c] c[ c] c }
Changing beam knee gap
Kneed beams are inserted automatically when a large gap is detected
between the note heads. This behavior can be tuned through the
auto-knee-gap
property. A kneed beam is drawn if the gap is
larger than the value of auto-knee-gap
plus the width of the
beam object (which depends on the duration of the notes and the slope
of the beam). By default auto-knee-gap
is set to 5.5 staff
spaces.
{ f8 f''8 f8 f''8 \override Beam #'auto-knee-gap = #6 f8 f''8 f8 f''8 }
Notation Reference: Manual beams, Setting automatic beam behavior.
Installed Files: scm/auto-beam.scm.
Snippets: Rhythms.
Internals Reference: Beam.
Automatically kneed cross-staff beams cannot be used together with hidden staves. See Hiding staves.
Beams can collide with note heads and accidentals in other voices