Finds the shift and scale that carry the places of rollA onto those
of rollB, reading each through its own bar. Runs of pitches that
occur once on each roll anchor a first line; then every note is paired
with its nearest counterpart of the same pitch and the line refitted,
the window closing each time. A copy cut for another paper speed, a
scan with a calibration pattern, and holes the other copy lacks are
all within reach of that. Nothing is found where the rolls share no
run of pitches, as between two different pieces.
Two bars are what lets a copy cut for one system be aligned against a
copy cut for another, a T-98 against a T-100: the bars put the note
positions on different tracks, but they agree on the pitch each track
sounds, and it is the pitches that are matched. Where a copy's holes
have already been put onto the edition's bar, that bar reads it.
Finds the shift and scale that carry the places of
rollAonto those ofrollB, reading each through its own bar. Runs of pitches that occur once on each roll anchor a first line; then every note is paired with its nearest counterpart of the same pitch and the line refitted, the window closing each time. A copy cut for another paper speed, a scan with a calibration pattern, and holes the other copy lacks are all within reach of that. Nothing is found where the rolls share no run of pitches, as between two different pieces.Two bars are what lets a copy cut for one system be aligned against a copy cut for another, a T-98 against a T-100: the bars put the note positions on different tracks, but they agree on the pitch each track sounds, and it is the pitches that are matched. Where a copy's holes have already been put onto the edition's bar, that bar reads it.