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.
OptionalkeyThe key, when it is already known: read as one key across the whole span, as chordTimelineFromNotes reads it. Omit it to have the keys searched for over time.
OptionaltimelineThe harmony, given rather than inferred — the shape an arrangement's
timeline option takes. The key regions are still read from key or,
without one, from the notes.
OptionalmelodyThe melodic line. Omit it to read the top line of notes, where notes
struck together are one event and the highest of them stands for it.
OptionaltotalEnd of the analysed span in beats.
OptionalbudgetUpper bound on the work each analysis may do.
Options for analyzeReference.