(extremity-rules . ,default-slur-extremity-rules)
(extremity-offset-alist . ,default-slur-extremity-offset-alist)
(de-uglify-parameters . ( 1.5 0.8 -2.0))
+ (Y-extent-callback . ,Slur::height)
(details . ((height-limit . 2.0) (ratio . 0.333) (force-blowfit . 0.5)
(bezier-pct-c0 . -0.2) (bezier-pct-c3 . 0.000006)
(bezier-pct-out-max . 0.8) (bezier-pct-in-max . 1.2)