RFC on Case 3 below. Thanks. — Dan \version "2.20.0"
upper = f''1 lower = e'1 %% CASE 1: When the music in each simultaneous element begins with a %% note, the upper staff is created first. \score { << \upper \lower >> } %% CASE 2: When there are sets preceding the notes in both branches, %% the upper staff is still created first. \score { << { \set Timing.vocalName = "2a" \set Timing.vocalName = "2b" \upper } { \set Timing.vocalName = "2" \lower } >> } %% CASE 3: When only the first branch begins with a set, the staves %% switch places. Surprise! %% %% To fix this inconsistency, I suggest that as %% Sequential_iterator::process() currently handles all the music up %% to a given moment, Sequential_iterator::construct_children() should %% handle all music at the initial moment--not just the first element. %% \score { << { \set Timing.vocalName = "3" \upper } \lower >> }