+
+%% why a function?
+breathe =
+#(define-music-function (parser location) ()
+ (make-music 'EventChord
+ 'origin location
+ 'elements (list (make-music 'BreathingEvent))))
+
+bendAfter =
+#(define-music-function (parser location delta) (integer?)
+
+ (make-music 'BendAfterEvent
+ 'delta-step delta))
+
+clef =
+#(define-music-function (parser location type)
+ (string?)
+ (_i "Set the current clef.")
+
+ (make-clef-set type))
+
+
+compressMusic =
+#(define-music-function
+ (parser location fraction music) (number-pair? ly:music?)
+ (ly:music-compress music (ly:make-moment (car fraction) (cdr fraction))))
+
+
+cueDuring =
+#(define-music-function
+ (parser location what dir main-music)
+ (string? ly:dir? ly:music?)
+ (make-music 'QuoteMusic
+ 'element main-music
+ 'quoted-context-type 'Voice
+ 'quoted-context-id "cue"
+ 'quoted-music-name what
+ 'quoted-voice-direction dir
+ 'origin location))
+
+displayLilyMusic =
+#(define-music-function (parser location music) (ly:music?)
+ (newline)
+ (display-lily-music music parser)
+ music)
+
+displayMusic =
+#(define-music-function (parser location music) (ly:music?)
+ (newline)
+ (display-scheme-music music)
+ music)
+
+featherDurations=
+#(define-music-function (parser location factor argument) (ly:moment? ly:music?)
+ (_i "Rearrange durations in ARGUMENT so there is an
+acceleration/deceleration. ")
+
+ (let*
+ ((orig-duration (ly:music-length argument))
+ (multiplier (ly:make-moment 1 1)))
+
+ (music-map
+ (lambda (mus)
+ (if (and (eq? (ly:music-property mus 'name) 'EventChord)
+ (< 0 (ly:moment-main-denominator (ly:music-length mus))))
+ (begin
+ (ly:music-compress mus multiplier)
+ (set! multiplier (ly:moment-mul factor multiplier)))
+ )
+ mus)
+ argument)
+
+ (ly:music-compress
+ argument
+ (ly:moment-div orig-duration (ly:music-length argument)))
+
+ argument))