OptionaltsA single time signature held across the whole span, as sugar for a
one-element meters; defaults to 4/4. Giving both is an input error.
OptionalmetersThe meter as it changes over the span, so a piece that changes metre is cut at its own bar lines.
OptionalunitLength of the unit spans are compared in, in bars; defaults to one hyperbar.
Sections are found by comparing equal units and merging the neighbours that match, so this is the resolution of the answer rather than the length of a section: a section is any whole number of units long.
OptionalthresholdHow alike two units must be before the later one is called a restatement of the earlier, in [0, 1].
OptionaltotalEnd of the analysed span in beats; defaults to the end of the last note.
OptionalbudgetUpper bound on the work this call may do.
Options for sectionsFromNotes.