LilyPond Beginnershandleiding

Hoofdstuk 3: Fundamentele concepten 63
Accidental engraver Makes accidentals, cautionary and suggested accidentals
Beam engraver Engraves beams
Clef engraver Engraves clefs
Completion heads engraver Splits notes which cross bar lines
New dynamic engraver Creates hairpins and dynamic texts
Forbid line break engraver Prevents line breaks if a musical element is still active
Key engraver Creates the key signature
Metronome mark engraver Engraves metronome marking
Note heads engraver Engraves note heads
Rest engraver Engraves rests
Staff symbol engraver Engraves the five (by default) lines of the staff
Stem engraver Creates stems and single-stem tremolos
Time signature engraver Creates time signatures
We shall see later how the output of LilyPond can be changed by modifying the action of
Engravers.
Zie ook
Internals reference: Sectie “Engravers and Performers” in Internals handleiding.
3.3.4 Modifying context properties
Contexts are responsible for holding the values of a number of context properties. Many of them
can be changed to influence the interpretation of the input and so change the appearance of the
output. They are changed by the \set command. This takes the form
\set ContextName.propertyName = #value
Where the ContextName is usually Score, Staff or Voice. It may be omitted, in which case
the current context (typically Voice) is assumed.
The names of context properties consist of words joined together with no hyphens or underscores,
all except the first having a capital letter. Here are a few examples of some commonly
used ones. There are many more.
propertyName Type Function Example
Value
extraNatural Boolean If true, set extra natural signs before
accidentals
#t, #f
currentBarNumber Integer Set the current bar number 50
doubleSlurs Boolean If true, print slurs both above and below
notes
#t, #f
instrumentName Text Set the name to be placed at the start of
the staff
"Cello I"
fontSize Real Increase or decrease the font size 2.4
stanza Text Set the text to print before the start of
a verse
"2"
where a Boolean is either True (#t) or False (#f), an Integer is a positive whole number, a Real
is a positive or negative decimal number, and text is enclosed in double apostrophes. Note the
occurrence of hash signs, (#), in two different places – as part of the Boolean value before the t
or f, and before value in the \set statement. So when a Boolean is being entered you need to
code two hash signs, e.g., ##t.
Before we can set any of these properties we need to know in which context they operate.
Sometimes this is obvious, but occasionally it can be tricky. If the wrong context is specified,