Colored background
…it could be helpful to put a colored background behind some notes.
…unimi.it/LSR/Item?u=1&id=960 colorSpan = #(define-music-function (y-lower y-upper color) (number? number? color?) … …ClusterSpanner.layer = #-1 \makeClusters { c'2 g' c' } } >> \colorSpan #-2 #2 #(rgb-color 0.5 1.0 0.5) r4\startGroup r \stopGroup \colorSpan #-2 #0 #red r\startGroup s s r\…