1 #(ly:set-option 'old-relative)
5 texidoc="@cindex Smart Transpose
7 Here's a copy of my feature request :
9 Your task, if you accept it is to implement a \smarttranspose
10 command> that would translate such oddities into more natural
11 notations. Double accidentals should be removed, as well as E-sharp
12 (-> F), bC (-> B), bF (-> E), B-sharp (-> C).
15 You mean like this. (Sorry 'bout the nuked indentation.)
17 Modified to use the standard transpose mechanism. The question is
18 how useful these enharmonic modifications are. Mats B.
23 #(define (unhair-pitch p)
24 (let* ((o (ly:pitch-octave p))
25 (a (ly:pitch-alteration p))
26 (n (ly:pitch-notename p)))
29 ((and (> a 0) (or (eq? n 6) (eq? n 2)))
30 (set! a (- a 1)) (set! n (+ n 1)))
31 ((and (< a 0) (or (eq? n 0) (eq? n 3)))
32 (set! a (+ a 1)) (set! n (- n 1))))
35 ((eq? a 2) (set! a 0) (set! n (+ n 1)))
36 ((eq? a -2) (set! a 0) (set! n (- n 1))))
38 (if (< n 0) (begin (set! o (- o 1)) (set! n (+ n 7))))
39 (if (> n 6) (begin (set! o (+ o 1)) (set! n (- n 7))))
41 (ly:make-pitch o n a)))
43 #(define (simplify music)
44 (let* ((es (ly:get-mus-property music 'elements))
45 (e (ly:get-mus-property music 'element))
46 (p (ly:get-mus-property music 'pitch)))
51 (map (lambda (x) (simplify x)) es)))
60 (set! p (unhair-pitch p))
61 (ly:set-mus-property! music 'pitch p)))
65 music = \notes \relative c' { c4 d e f g a b c }
68 \notes \context Staff {
69 \transpose c ais \music
70 \apply #simplify \transpose c ais \music
72 \paper { raggedright = ##t}