bracket.place(optional)Used to state where a tuplet bracket will be placed in relation to the note
heads.
Value conforms to data.STAFFREL.basic.
bracket.visible(optional)States whether a bracket should be rendered with a tuplet.
Value conforms to data.BOOLEAN.
dur.visible(optional)Determines if the tuplet duration is visible.
Value conforms to data.BOOLEAN.
num.format(optional)Controls how the num:numbase ratio is to be displayed.
Allowed values are:
"count" (Only the num attribute is displayed, , '7'.), "ratio" (Both the num and numbase attributes are displayed, , '7:4'.)