Hello,
I cannot find a simple explanation to this common behavior of time
signatures and key signatures in simultanepus staves.
"Time signatures entered in one staff affect all other staves by
default. On the other hand, the key signature of one staff does not
affect other staves. This different default behavior is because scores
with transposing instruments are more common than polyrhythmic scores. "
I have searched a lot about contexts and engravers but I haven't found
what's the mechanism this relies on, or where is it coded in the sources.
--
Francisco Vila, Ph.D. - Badajoz (Spain)
paconet.org , lilypond.es