;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
-;;;; Copyright (C) 2000--2011 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;; Copyright (C) 2000--2012 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
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)))
(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)) )
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