MKTuningSystem.h

/*
  $Id: MKTuningSystem.h 3449 2009-04-04 16:52:47Z leighsmith $
  Defined In: The MusicKit
  HEADER FILES: MusicKit.h

  Description: 
    See the Headerdoc description below.   

  Original Author: David A. Jaffe

  Copyright (c) 1988-1992, NeXT Computer, Inc.
  Portions Copyright (c) 1994 NeXT Computer, Inc. and reproduced under license from NeXT
  Portions Copyright (c) 1994 Stanford University  
  Portions Copyright (c) 1999-2004, The MusicKit Project.
*/
#ifndef __MK_TuningSystem_H___
#define __MK_TuningSystem_H___

#import <Foundation/NSObject.h>

#import "keynums.h"

@interface MKTuningSystem : NSObject
{
    NSMutableArray *frequencies; 
}

+ (MKTuningSystem *) tuningSystem; 

- init;

- copyWithZone: (NSZone *) zone;

- (void) setTo12ToneTempered; 

- install; 

- (int) keyCount;

+ (NSString *) pitchNameForKeyNum: (int) keyNum;

+ (double) freqForKeyNum: (MKKeyNum) aKeyNum; 

- (double) freqForKeyNum: (MKKeyNum) aKeyNum; 

+ (MKKeyNum) keyNumForFreq: (double) freq
               pitchBentBy: (int *) bendPtr
           bendSensitivity: (double) sensitivity;

- setKeyNum: (MKKeyNum) aKeyNum toFreq: (double) freq;

+ setKeyNum: (MKKeyNum) aKeyNum toFreq: (double) freq; 

- setKeyNumAndOctaves: (MKKeyNum) aKeyNum toFreq: (double) freq;

+ setKeyNumAndOctaves: (MKKeyNum) aKeyNum toFreq: (double) freq;

+ (void) transpose: (double) semitones; 

#if 0
 /* some versions of gcc can't deal properly with class methods that have
  * the same name as instance methods in other classes. So I have renamed
  * this one because of a conflict with NSResponder:-transpose
  */
+ (void)_transpose:(double)semitones;
#endif

- (void) transpose: (double) semitones; 

+ (int) findPitchVar: (id) aVar;

@end

/* Functions for tuning and frequency conversion */

double MKTranspose(double freq, double semiTonesUp);

double MKAdjustFreqWithPitchBend(double freq, int pitchBend, double sensitivity);

#endif

---