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00001 #ifndef STK_BLOWBOTL_H 00002 #define STK_BLOWBOTL_H 00003 00004 #include "Instrmnt.h" 00005 #include "JetTable.h" 00006 #include "BiQuad.h" 00007 #include "PoleZero.h" 00008 #include "Noise.h" 00009 #include "ADSR.h" 00010 #include "SineWave.h" 00011 00012 namespace stk { 00013 00014 /***************************************************/ 00030 /***************************************************/ 00031 00032 class BlowBotl : public Instrmnt 00033 { 00034 public: 00036 00039 BlowBotl( void ); 00040 00042 ~BlowBotl( void ); 00043 00045 void clear( void ); 00046 00048 void setFrequency( StkFloat frequency ); 00049 00051 void startBlowing( StkFloat amplitude, StkFloat rate ); 00052 00054 void stopBlowing( StkFloat rate ); 00055 00057 void noteOn( StkFloat frequency, StkFloat amplitude ); 00058 00060 void noteOff( StkFloat amplitude ); 00061 00063 void controlChange( int number, StkFloat value ); 00064 00066 StkFloat tick( unsigned int channel = 0 ); 00067 00068 protected: 00069 00070 JetTable jetTable_; 00071 BiQuad resonator_; 00072 PoleZero dcBlock_; 00073 Noise noise_; 00074 ADSR adsr_; 00075 SineWave vibrato_; 00076 StkFloat maxPressure_; 00077 StkFloat noiseGain_; 00078 StkFloat vibratoGain_; 00079 StkFloat outputGain_; 00080 00081 }; 00082 00083 inline StkFloat BlowBotl :: tick( unsigned int ) 00084 { 00085 StkFloat breathPressure; 00086 StkFloat randPressure; 00087 StkFloat pressureDiff; 00088 00089 // Calculate the breath pressure (envelope + vibrato) 00090 breathPressure = maxPressure_ * adsr_.tick(); 00091 breathPressure += vibratoGain_ * vibrato_.tick(); 00092 00093 pressureDiff = breathPressure - resonator_.lastOut(); 00094 00095 randPressure = noiseGain_ * noise_.tick(); 00096 randPressure *= breathPressure; 00097 randPressure *= (1.0 + pressureDiff); 00098 00099 resonator_.tick( breathPressure + randPressure - ( jetTable_.tick( pressureDiff ) * pressureDiff ) ); 00100 lastFrame_[0] = 0.2 * outputGain_ * dcBlock_.tick( pressureDiff ); 00101 00102 return lastFrame_[0]; 00103 } 00104 00105 } // stk namespace 00106 00107 #endif
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