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 read against its own bar lines throughout.
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 analyzeRhythm.