Where along the roll the symbol lies, as its carriers put it, or
nothing for a symbol no copy carries.
Either end is the median of the carriers' rather than their mean, so
that a copy which puts the symbol well away from the rest, torn,
stretched or badly aligned there, does not draw it away from where
the others agree it lies. Two carriers have the two alike.
Only the place is measured. Which track the symbol sits on is not
a measurement but a question for a tracker bar, since a note of
one pitch sits on exactly one position of a given bar: ask
bar.positionOf. The carriers cannot answer it, because a copy
cut for another system numbers its tracks differently, and one
symbol may be carried by copies of both — averaging a red carrier
on track 47 with a green one on 45 would give 46, a legal
position a semitone away on either bar.
Where along the roll the symbol lies, as its carriers put it, or nothing for a symbol no copy carries.
Either end is the median of the carriers' rather than their mean, so that a copy which puts the symbol well away from the rest, torn, stretched or badly aligned there, does not draw it away from where the others agree it lies. Two carriers have the two alike.
Only the place is measured. Which track the symbol sits on is not a measurement but a question for a tracker bar, since a note of one pitch sits on exactly one position of a given bar: ask
bar.positionOf. The carriers cannot answer it, because a copy cut for another system numbers its tracks differently, and one symbol may be carried by copies of both — averaging a red carrier on track 47 with a green one on 45 would give 46, a legal position a semitone away on either bar.