-;;; - `music->lily-string' return a string describing a music expression using
-;;; LilyPond notation. The special variables *indent*, *previous-duration*,
-;;; and *force-duration* influence the indentation level and the display of
-;;; music durations.
+;;; - `music->lily-string' return a string describing a music
+;;; expression using LilyPond notation. The special variables *indent*
+;;; and *omit-duration* influence the indentation level and the
+;;; display of music durations.