Previous: Aligning to cadenzas, Up: Special rhythmic concerns
Time is administered by the Timing_translator
, which by
default is to be found in the Score
context. An alias,
Timing
, is added to the context in which the
Timing_translator
is placed.
The following properties of Timing
are used
to keep track of timing within the score.
currentBarNumber
measureLength
measurePosition
measureLength
whenever
measureLength
is reached or exceeded. When that happens,
currentBarNumber
is incremented.
timing
Timing can be changed by setting any of these variables
explicitly. In the next example, the default 4/4 time
signature is printed, but measureLength
is set to 5/4.
At 4/8 through the third measure, the measurePosition
is
advanced by 1/8 to 5/8, shortening that bar by 1/8.
The next bar line then falls at 9/8 rather than 5/4.
\set Score.measureLength = #(ly:make-moment 5 4) c1 c4 c1 c4 c4 c4 \set Score.measurePosition = #(ly:make-moment 5 8) b4 b4 b8 c4 c1
As the example illustrates, ly:make-moment n m
constructs a
duration of n/m of a whole note. For example,
ly:make-moment 1 8
is an eighth note duration and
ly:make-moment 7 16
is the duration of seven sixteenths
notes.
This manual: Bar numbers, Unmetered music
Snippets: Rhythms.
Internals Reference: Timing_translator, Score
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