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# Flute.h

    00001 #ifndef STK_FLUTE_H
    00002 #define STK_FLUTE_H
    00003
    00004 #include "Instrmnt.h"
    00005 #include "JetTable.h"
    00006 #include "DelayL.h"
    00007 #include "OnePole.h"
    00008 #include "PoleZero.h"
    00009 #include "Noise.h"
    00010 #include "ADSR.h"
    00011 #include "SineWave.h"
    00012
    00013 namespace stk {
    00014
    00015 /***************************************************/
    00037 /***************************************************/
    00038
    00039 class Flute : public Instrmnt
    00040 {
    00041  public:
    00043
    00046   Flute( StkFloat lowestFrequency );
    00047
    00049   ~Flute( void );
    00050
    00052   void clear( void );
    00053
    00055   void setFrequency( StkFloat frequency );
    00056
    00058   void setJetReflection( StkFloat coefficient );
    00059
    00061   void setEndReflection( StkFloat coefficient );
    00062
    00064   void setJetDelay( StkFloat aRatio );
    00065
    00067   void startBlowing( StkFloat amplitude, StkFloat rate );
    00068
    00070   void stopBlowing( StkFloat rate );
    00071
    00073   void noteOn( StkFloat frequency, StkFloat amplitude );
    00074
    00076   void noteOff( StkFloat amplitude );
    00077
    00079   void controlChange( int number, StkFloat value );
    00080
    00082   StkFloat tick( unsigned int channel = 0 );
    00083
    00084  protected:
    00085
    00086   DelayL   jetDelay_;
    00087   DelayL   boreDelay_;
    00088   JetTable jetTable_;
    00089   OnePole  filter_;
    00090   PoleZero dcBlock_;
    00091   Noise    noise_;
    00092   ADSR     adsr_;
    00093   SineWave vibrato_;
    00094   unsigned long length_;
    00095   StkFloat lastFrequency_;
    00096   StkFloat maxPressure_;
    00097   StkFloat jetReflection_;
    00098   StkFloat endReflection_;
    00099   StkFloat noiseGain_;
    00100   StkFloat vibratoGain_;
    00101   StkFloat outputGain_;
    00102   StkFloat jetRatio_;
    00103
    00104 };
    00105
    00106 inline StkFloat Flute :: tick( unsigned int )
    00107 {
    00108   StkFloat pressureDiff;
    00109   StkFloat breathPressure;
    00110
    00111   // Calculate the breath pressure (envelope + noise + vibrato)
    00112   breathPressure = maxPressure_ * adsr_.tick();
    00113   breathPressure += breathPressure * ( noiseGain_ * noise_.tick() + vibratoGain_ * vibrato_.tick() );
    00114
    00115   StkFloat temp = filter_.tick( boreDelay_.lastOut() );
    00116   temp = dcBlock_.tick( temp ); // Block DC on reflection.
    00117
    00118   pressureDiff = breathPressure - (jetReflection_ * temp);
    00119   pressureDiff = jetDelay_.tick( pressureDiff );
    00120   pressureDiff = jetTable_.tick( pressureDiff ) + (endReflection_ * temp);
    00121   lastFrame_[0] = (StkFloat) 0.3 * boreDelay_.tick( pressureDiff );
    00122
    00123   lastFrame_[0] *= outputGain_;
    00124   return lastFrame_[0];
    00125 }
    00126
    00127 } // stk namespace
    00128
    00129 #endif

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