> oo = #(define-music-function (parser location prop value) > (symbol-list? scheme?) > #{ \once \override #prop = #value #}) > > should likely work fine in 2.18.
Thanks! Aaron provided this version oo = #(define-music-function (parser location prop value) (list? scheme?) #{ \once \override $prop = #value #}) and I wonder which one is better... Werer