Index into plan.phrases of the phrase this statement is placed in.
First beat of the statement.
End of the statement, exclusive.
How many notes the statement carries; a root's generated length, a derivation's inherited from its source.
A root's onset-to-onset gaps in beats, notes - 1 of them, summing to
less than the statement's length: its reference motif's ratios times
ReferenceMotif.unitBeats. The first note sounds at startBeat
and the last lasts to endBeat. Null for a root whose onsets a generator
draws from plan.rhythm; always null for a derivation, whose rhythm is
its source's under the named transformation.
Index into plan.motifs of the statement this one derives from; null for a root. Always less than this statement's own index.
The named transformation from from, or null for a root, or for a
derivation with no named transformation (a variation). Its semitones
and degrees are the preferred pitch level: a generator may place the
derivation at another level to keep it inside the register and the harmony.
One planned motif statement: a root the generator writes new notes for, or a derivation the generator obtains from an earlier statement by a named transformation.