OptionalcontrolHow far above its position an expression number sits. Defaults to what his samples show for that bar.
OptionalextensionHow much longer a valve is held on than the perforation that opened it, taken off the end of every chain so that these lengths can be compared with a scanned copy's. Nothing leaves the chains as the reader reported them, which is what every copy read before this option existed states.
The copy records what was taken, and revertShortening puts it
back, so a figure revised later needs no second import. On
welte225.org the extension measures about 1.6 mm, with no
dependence on how long the perforation is.
OptionalplaceWhere on the paper the roll had run after so many seconds. The
default is the constant speed the system states, which ignores
the take-up spool; pass paperAt of welte-mignon-emulator to
account for it.
OptionalsystemThe bar the file numbers its positions by, which is the bar of the roll he read.
How
readFromPhillipsErollreads a file: the bar it numbers its positions by, where its expression numbers sit, how time is put back onto the paper, and what the reader added to the chains.