Hello, I am having a discussion with a colleague wether a key change should be preceded with a double barline yes or no.
In E. Gould she says double barline only when also a new musical section (otherwise single barline).
In Ted Ross from 1978 it shows the double barline as standard.
What would be the best for notating 18th century music?
Example Ted Ross:
Example Elaine Gould: