what about \set Score.measureLength = #(ly:make-moment 2/4)
as far as i know \partial is only for the beginning and from then on you use ly:make-moment eg %%%%%%%%%%%%%%%%%%% \version "2.18.2" top = \relative c' { \partial 2 r2 | d2 r2 | d4 r4 \bar "|." d d | d d d d | d d | } bottom = \relative c' { \partial 2 r2 | d2 r2 | d4 r4 \bar "|." d d | d d d d | \set Score.measureLength = #(ly:make-moment 2/4) d d | \set Score.measureLength = #(ly:make-moment 4/4) d d d d| } \score { <<\top \\ \bottom>> } HTH Stephen
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