Visual tuplet numbers can be turned on or off for a spine.

Music notation containing a lot of tuplets will often drop tuplet numbers after the first few occurrences of tuplets when the rhythmic interpretation without the number remains clear. Below is an example of omitted triplet numbers in the first movement of Beethoven’s moonlight sonata. Only the first measure contains visible tuplet numbers, and subsequent triplets are not marked:

moonlight sonata mvmt 1, mm 1-8
Beethoven, Moonlight sonata, mvmt.1, mm. 1–8.

To turn off tuplet numbers in a Humdrum **kern spine, add the tandem interpretation *Xtuplet somewhere in front of the first note of a tuplet that should have a suppressed number. To start displaying visual tuplet numbers again in the same spine, add the tandem interpretation *tuplet.

Try moving or adding *tuplet/*Xtuplet interpretations in the above Humdrum data to see how this affects the music notation on the right.

In the future, other parameters will probably be added to the styling interpretation, such as whether or not to display the tuplet numbers above or below stems/beams.

Positioning tuplet numbers

The tuplet number can be adjusted above or below the staff by using a layout command immediately preceding the note that is at the beginning of a tuplet group.