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Saxofony.h
1 #ifndef STK_SAXOFONY_H
2 #define STK_SAXOFONY_H
3 
4 #include "Instrmnt.h"
5 #include "DelayL.h"
6 #include "ReedTable.h"
7 #include "OneZero.h"
8 #include "Envelope.h"
9 #include "Noise.h"
10 #include "SineWave.h"
11 
12 namespace stk {
13 
14 /***************************************************/
49 /***************************************************/
50 
51 class Saxofony : public Instrmnt
52 {
53  public:
55 
58  Saxofony( StkFloat lowestFrequency );
59 
61  ~Saxofony( void );
62 
64  void clear( void );
65 
67  void setFrequency( StkFloat frequency );
68 
70  void setBlowPosition( StkFloat aPosition );
71 
73  void startBlowing( StkFloat amplitude, StkFloat rate );
74 
76  void stopBlowing( StkFloat rate );
77 
79  void noteOn( StkFloat frequency, StkFloat amplitude );
80 
82  void noteOff( StkFloat amplitude );
83 
85  void controlChange( int number, StkFloat value );
86 
88  StkFloat tick( unsigned int channel = 0 );
89 
91 
98  StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
99 
100  protected:
101 
102  DelayL delays_[2];
103  ReedTable reedTable_;
104  OneZero filter_;
105  Envelope envelope_;
106  Noise noise_;
107  SineWave vibrato_;
108 
109  StkFloat outputGain_;
110  StkFloat noiseGain_;
111  StkFloat vibratoGain_;
112  StkFloat position_;
113 
114 };
115 
116 inline StkFloat Saxofony :: tick( unsigned int )
117 {
118  StkFloat pressureDiff;
119  StkFloat breathPressure;
120  StkFloat temp;
121 
122  // Calculate the breath pressure (envelope + noise + vibrato)
123  breathPressure = envelope_.tick();
124  breathPressure += breathPressure * noiseGain_ * noise_.tick();
125  breathPressure += breathPressure * vibratoGain_ * vibrato_.tick();
126 
127  temp = -0.95 * filter_.tick( delays_[0].lastOut() );
128  lastFrame_[0] = temp - delays_[1].lastOut();
129  pressureDiff = breathPressure - lastFrame_[0];
130  delays_[1].tick( temp );
131  delays_[0].tick( breathPressure - (pressureDiff * reedTable_.tick(pressureDiff)) - temp );
132 
133  lastFrame_[0] *= outputGain_;
134  return lastFrame_[0];
135 }
136 
137 inline StkFrames& Saxofony :: tick( StkFrames& frames, unsigned int channel )
138 {
139  unsigned int nChannels = lastFrame_.channels();
140 #if defined(_STK_DEBUG_)
141  if ( channel > frames.channels() - nChannels ) {
142  oStream_ << "Saxofony::tick(): channel and StkFrames arguments are incompatible!";
143  handleError( StkError::FUNCTION_ARGUMENT );
144  }
145 #endif
146 
147  StkFloat *samples = &frames[channel];
148  unsigned int j, hop = frames.channels() - nChannels;
149  if ( nChannels == 1 ) {
150  for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
151  *samples++ = tick();
152  }
153  else {
154  for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
155  *samples++ = tick();
156  for ( j=1; j<nChannels; j++ )
157  *samples++ = lastFrame_[j];
158  }
159  }
160 
161  return frames;
162 }
163 
164 } // stk namespace
165 
166 #endif

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