X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=scm%2Fmidi.scm;h=cf43d3af7592759e5f5887812a1b6f2667665ce1;hb=def21b306e2b8fa2d5630fab0878e9922e197f0c;hp=ca26e2dfb1780a4a61cd39dc419544a6ff5d997b;hpb=cc442d6c8d1564a78caac37b2ef0c8b9bdc76fbc;p=lilypond.git

diff --git a/scm/midi.scm b/scm/midi.scm
index ca26e2dfb1..cf43d3af75 100644
--- a/scm/midi.scm
+++ b/scm/midi.scm
@@ -2,7 +2,7 @@
 ;;;;
 ;;;;  source file of the GNU LilyPond music typesetter
 ;;;; 
-;;;; (c) 2000--2005 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;; (c) 2000--2007 Jan Nieuwenhuizen <janneke@gnu.org>
 
 
 
@@ -28,7 +28,7 @@
 	("pp" . 0.49)
 	("ppp" . 0.42)
 	("pppp" . 0.34)
-	("ppppp" . 0.25)	)
+	("ppppp" . 0.25)
 	)
       absolute-volume-alist))
 
@@ -276,4 +276,25 @@ returns the program of the instrument
 
 (define-public (alterations-in-key pitch-list)
   "Count number of sharps minus number of flats"
-  (/ (apply + (map cdr pitch-list)) 2))
+  
+  (* (apply + (map cdr pitch-list)) 2))
+
+
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;
+
+(define-public (write-performances-midis performances basename . rest)
+  (let ((midi-ext (ly:get-option 'midi-extension)))
+  (let
+      loop
+    ((perfs performances)
+     (count (if (null? rest) 0 (car rest))))
+    (if (pair?  perfs)
+	(begin
+	  (ly:performance-write
+	   (car perfs)
+	   (if (> count 0)
+	       (format #f "~a-~a.~a" basename count midi-ext)
+	       (format #f "~a.~a" basename midi-ext)))
+	  (loop (cdr perfs) (1+ count))))))