source file of the GNU LilyPond music typesetter
- (c) 1998--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1998--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "lily-proto.hh"
#include "smobs.hh"
-/** A "tonal" pitch. This is a pitch used in diatonal western
- music (12 semitones in an octave), as opposed to a frequency in Hz
- or a integer number of semitones.
+/** A "tonal" pitch. This is a pitch used in diatonal western music
+ (24 quartertones in an octave), as opposed to a frequency in Hz or a
+ integer number of semitones.
Pitch is lexicographically ordered by (octave, notename,
alteration).
- add indeterminate octaves, so it can be used as a key in keySigature
- - abstract out the representation of alteration_, so we can
- put micropitches (quartertones, etc.) in the Pitch object
*/
class Pitch
{
TODO: use SCM
*/
- /// 0 is c, 6 is b
int notename_;
-
- /// 0 natural, 1 sharp, etc
int alteration_;
-
- /// 0 is central c
int octave_;
void transpose (Pitch);
Pitch to_relative_octave (Pitch) const;
static int compare (Pitch const&,Pitch const&);
- /// return large part of interval from central c
+
int steps () const;
- /// return pitch from central c (in halfnotes)
int semitone_pitch () const;
+ int quartertone_pitch () const;
String to_string () const;
SCM smobbed_copy () const;
DECLARE_SIMPLE_SMOBS (Pitch,);
};
+enum {
+ DOUBLE_FLAT = -4,
+ THREE_Q_FLAT,
+ FLAT ,
+ SEMI_FLAT,
+ NATURAL,
+ SEMI_SHARP,
+ SHARP ,
+ THREE_Q_SHARP,
+ DOUBLE_SHARP,
+};
+
SCM ly_pitch_transpose (SCM p, SCM delta);
DECLARE_UNSMOB(Pitch,pitch);