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# Clarinet.h

    00001 #ifndef STK_CLARINET_H
    00002 #define STK_CLARINET_H
    00003
    00004 #include "Instrmnt.h"
    00005 #include "DelayL.h"
    00006 #include "ReedTable.h"
    00007 #include "OneZero.h"
    00008 #include "Envelope.h"
    00009 #include "Noise.h"
    00010 #include "SineWave.h"
    00011
    00012 namespace stk {
    00013
    00014 /***************************************************/
    00036 /***************************************************/
    00037
    00038 class Clarinet : public Instrmnt
    00039 {
    00040  public:
    00042
    00045   Clarinet( StkFloat lowestFrequency );
    00046
    00048   ~Clarinet( void );
    00049
    00051   void clear( void );
    00052
    00054   void setFrequency( StkFloat frequency );
    00055
    00057   void startBlowing( StkFloat amplitude, StkFloat rate );
    00058
    00060   void stopBlowing( StkFloat rate );
    00061
    00063   void noteOn( StkFloat frequency, StkFloat amplitude );
    00064
    00066   void noteOff( StkFloat amplitude );
    00067
    00069   void controlChange( int number, StkFloat value );
    00070
    00072   StkFloat tick( unsigned int channel = 0 );
    00073
    00074  protected:
    00075
    00076   DelayL delayLine_;
    00077   ReedTable reedTable_;
    00078   OneZero filter_;
    00079   Envelope envelope_;
    00080   Noise noise_;
    00081   SineWave vibrato_;
    00082   long length_;
    00083   StkFloat outputGain_;
    00084   StkFloat noiseGain_;
    00085   StkFloat vibratoGain_;
    00086
    00087 };
    00088
    00089 inline StkFloat Clarinet :: tick( unsigned int )
    00090 {
    00091   StkFloat pressureDiff;
    00092   StkFloat breathPressure;
    00093
    00094   // Calculate the breath pressure (envelope + noise + vibrato)
    00095   breathPressure = envelope_.tick();
    00096   breathPressure += breathPressure * noiseGain_ * noise_.tick();
    00097   breathPressure += breathPressure * vibratoGain_ * vibrato_.tick();
    00098
    00099   // Perform commuted loss filtering.
    00100   pressureDiff = -0.95 * filter_.tick( delayLine_.lastOut() );
    00101
    00102   // Calculate pressure difference of reflected and mouthpiece pressures.
    00103   pressureDiff = pressureDiff - breathPressure;
    00104
    00105   // Perform non-linear scattering using pressure difference in reed function.
    00106   lastFrame_[0] = delayLine_.tick(breathPressure + pressureDiff * reedTable_.tick(pressureDiff));
    00107
    00108   // Apply output gain.
    00109   lastFrame_[0] *= outputGain_;
    00110
    00111   return lastFrame_[0];
    00112 }
    00113
    00114 } // stk namespace
    00115
    00116 #endif

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