X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=input%2Fnew%2Ftransposing-pitches-with-minimum-accidentals-smart-transpose.ly;h=f83861f6be21dc6d3d6e45a9a7ef5d5f4c9ec0bf;hb=dc8e9c050a98c809e66b10d9ae1d3df9d3b0190f;hp=bfcdee28d7a682de5d6e70837f7d7eeed03ba164;hpb=bdf982efc1fc4b3350de0341f2f4a10e81080898;p=lilypond.git diff --git a/input/new/transposing-pitches-with-minimum-accidentals-smart-transpose.ly b/input/new/transposing-pitches-with-minimum-accidentals-smart-transpose.ly index bfcdee28d7..f83861f6be 100644 --- a/input/new/transposing-pitches-with-minimum-accidentals-smart-transpose.ly +++ b/input/new/transposing-pitches-with-minimum-accidentals-smart-transpose.ly @@ -1,20 +1,36 @@ -\version "2.11.33" +\version "2.11.61" \header { - doctitle = "Transposing music with minimum accidentals" lsrtags = "pitches" - texidoc = "There is a way to enforce enharmonic modifications for -notes in order to have the minimum number of accidentals. In this -case, the following rules apply: + texidoc = "This example uses some Scheme code to enforce enharmonic +modifications for notes in order to have the minimum number of +accidentals. In this case, the following rules apply: + +@itemize +@item +Double accidentals should be removed + +@item +B sharp -> C + +@item +E sharp -> F -\"Double accidentals should be removed, as well as E sharp (-> F), -C flat (-> B), F flat (-> E) and B sharp (-> C)\". +@item +C flat -> B + +@item +F flat -> E + +@end itemize In this manner, the most natural enharmonic notes are chosen. -"} +" + doctitle = "Transposing music with minimum accidentals" +} #(define (naturalize-pitch p) (let* ((o (ly:pitch-octave p)) - (a (* 4 (ly:pitch-alteration p))) + (a (* 4 (ly:pitch-alteration p))) ; alteration, a, in quarter tone steps, for historical reasons (n (ly:pitch-notename p))) (cond @@ -27,8 +43,8 @@ In this manner, the most natural enharmonic notes are chosen. (cond ((> a 2) (set! a (- a 4)) (set! n (+ n 1))) ((< a -2) (set! a (+ a 4)) (set! n (- n 1)))) - (if (< n 0) (begin (set! o (- o 1)) (set! n (+ n 7)))) - (if (> n 6) (begin (set! o (+ o 1)) (set! n (- n 7)))) + (if (< n 0) (begin (set! o (- o 1)) (set! n (+ n 7)))) + (if (> n 6) (begin (set! o (+ o 1)) (set! n (- n 7)))) (ly:make-pitch o n (/ a 4)))) #(define (naturalize music) @@ -54,7 +70,7 @@ naturalizeMusic = (ly:music?) (naturalize m)) -music = \relative c' { c4 d e g } +music = \relative c' { c4 d e g } \score { \new Staff { @@ -63,5 +79,5 @@ music = \relative c' { c4 d e g } \transpose c deses \music \naturalizeMusic \transpose c deses \music } - \layout { ragged-right = ##t } + \layout { } }