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Moog.h
1 #ifndef STK_MOOG_H
2 #define STK_MOOG_H
3 
4 #include "Sampler.h"
5 #include "FormSwep.h"
6 
7 namespace stk {
8 
9 /***************************************************/
27 /***************************************************/
28 
29 class Moog : public Sampler
30 {
31  public:
33 
36  Moog( void );
37 
39  ~Moog( void );
40 
42  void setFrequency( StkFloat frequency );
43 
45  void noteOn( StkFloat frequency, StkFloat amplitude );
46 
48  void setModulationSpeed( StkFloat mSpeed ) { loops_[1]->setFrequency( mSpeed ); };
49 
51  void setModulationDepth( StkFloat mDepth ) { modDepth_ = mDepth * 0.5; };
52 
54  void controlChange( int number, StkFloat value );
55 
57  StkFloat tick( unsigned int channel = 0 );
58 
60 
67  StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
68 
69  protected:
70 
71  FormSwep filters_[2];
72  StkFloat modDepth_;
73  StkFloat filterQ_;
74  StkFloat filterRate_;
75 
76 };
77 
78 inline StkFloat Moog :: tick( unsigned int )
79 {
80  StkFloat temp;
81 
82  if ( modDepth_ != 0.0 ) {
83  temp = loops_[1]->tick() * modDepth_;
84  loops_[0]->setFrequency( baseFrequency_ * (1.0 + temp) );
85  }
86 
87  temp = attackGain_ * attacks_[0]->tick();
88  temp += loopGain_ * loops_[0]->tick();
89  temp = filter_.tick( temp );
90  temp *= adsr_.tick();
91  temp = filters_[0].tick( temp );
92  lastFrame_[0] = filters_[1].tick( temp );
93  return lastFrame_[0] * 6.0;
94 }
95 
96 inline StkFrames& Moog :: tick( StkFrames& frames, unsigned int channel )
97 {
98  unsigned int nChannels = lastFrame_.channels();
99 #if defined(_STK_DEBUG_)
100  if ( channel > frames.channels() - nChannels ) {
101  oStream_ << "Moog::tick(): channel and StkFrames arguments are incompatible!";
102  handleError( StkError::FUNCTION_ARGUMENT );
103  }
104 #endif
105 
106  StkFloat *samples = &frames[channel];
107  unsigned int j, hop = frames.channels() - nChannels;
108  if ( nChannels == 1 ) {
109  for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
110  *samples++ = tick();
111  }
112  else {
113  for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
114  *samples++ = tick();
115  for ( j=1; j<nChannels; j++ )
116  *samples++ = lastFrame_[j];
117  }
118  }
119 
120  return frames;
121 }
122 
123 } // stk namespace
124 
125 #endif

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