OptionalafterA command whose onset this one follows when the roll is
performed, the counterpart of before. This points to the
command by its @id.
OptionalalignedIn piano rolls, commands are often aligned with other commands,
e.g. a "crescendo off" might be logically aligned to the start of
a note. This points to the command by its @id.
OptionalbeforeA command whose onset this one precedes when the roll is
performed, without saying by how much: a "crescendo off" ends
before the note it leads to begins, even where the copies
disagree on it. Where the measurement has it so, nothing moves;
where it does not, this one is placed before the reference as
far as the copies that agree put it. This points to the command
by its @id.
References to the physical features (e.g. chains of holes) on the roll copies
that carry this symbol. Since the association might be debatable,
it can be annotated. There might be e.g. doubts about the meaning
and correct transcription of a feature on a physical roll.
This points to a feature by its @id.
The kind of command, named as the reproducing system of the roll names it: "SustainPedalOn", "ForzandoOff" and so on for the Welte-Mignon T-100. The tracker bar of the system lists the values it reads.
ReadonlyidA unique identifier for this object.
OptionalpairedThe command this one forms a pair with, e.g. a "forzando on"
with its "forzando off". Any two commands may be paired.
The distance between the two is fixed: whatever displaces the
one displaces the other. The relation is symmetric and is stated
on one side only. This points to the command by its @id.
Whether this expression applies to the bass or treble register.
An expression symbol, representing a command that governs dynamics, pedaling, or mechanical functions of the reproducing piano rather than sounding a note. Each expression has a scope (bass or treble) and a specific expression type.
See
reo:Expression