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BlowBotl.h

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

The Synthesis ToolKit in C++ (STK)
©1995-2010 Perry R. Cook and Gary P. Scavone. All Rights Reserved.