X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=scm%2Fmidi.scm;h=715c8c0e37fc8fa1ddf2d32fb9bfae90f188069e;hb=8b99c4145987f5b682f8b708849c4df87acd5949;hp=4180f1b517d294ce135e994c4d61ff0cd1fcd030;hpb=dd059e31c04c25120dbdc7c45822b19c800d9aca;p=lilypond.git

diff --git a/scm/midi.scm b/scm/midi.scm
index 4180f1b517..715c8c0e37 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>
 
 
 
@@ -276,4 +276,26 @@ 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)
+  (let
+      loop
+    ((perfs performances)
+     (count 0))
+
+
+    (if (pair?  perfs)
+	(begin
+	  (ly:performance-write
+	   (car perfs)
+	   (if (> count 0)
+	       (format #f "~a-~a.midi" basename count)
+	       (format #f "~a.midi" basename)))
+	  (loop (cdr perfs) (1+ count))))))