X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=scm%2Fmidi.scm;h=a3540e60ca3195e2f3f34b4b1a3bfcffa90fd5db;hb=4a03918c90866800b208ad12ffc019f577c8ab83;hp=5b274775a2c2ea603922792ef845782959b58937;hpb=bc95f4434f760d41191341ab4508b2064eb19025;p=lilypond.git

diff --git a/scm/midi.scm b/scm/midi.scm
index 5b274775a2..a3540e60ca 100644
--- a/scm/midi.scm
+++ b/scm/midi.scm
@@ -1,6 +1,6 @@
 ;;;; This file is part of LilyPond, the GNU music typesetter.
 ;;;;
-;;;; Copyright (C) 2000--2010 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;; Copyright (C) 2000--2011 Jan Nieuwenhuizen <janneke@gnu.org>
 ;;;;
 ;;;; LilyPond is free software: you can redistribute it and/or modify
 ;;;; it under the terms of the GNU General Public License as published by
@@ -262,14 +262,14 @@
        instrument-names-alist))
 
 (define-public (percussion? instrument)
-  "returns whether the instrument should use midi channel 9"
+  "Return @code{#t} if the instrument should use MIDI channel 9."
 
   (let* ((inst  (symbol->string instrument))
          (entry (assoc-get inst instrument-names-alist)))
     (and entry (>= entry 32768))))
 
 (define-public (midi-program instrument)
-  "returns the program of the instrument"
+  "Return the program of the instrument."
 
   (let* ((inst  (symbol->string instrument))
          (entry (assoc-get inst instrument-names-alist)))
@@ -282,10 +282,9 @@
 (define-public dynamic-default-volume 0.71)
 
 (define-public (alterations-in-key pitch-list)
-  "Count number of sharps minus number of flats"
-
-  (* (apply + (map cdr pitch-list)) 2))
+  "Count number of sharps minus number of flats."
 
+  (apply + (map (lambda (p) (round (* (cdr p) 2))) pitch-list)) )
 
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;