Home   Information   Classes   Download   Usage   Mail List   Requirements   Links   FAQ   Tutorial


Modal.h

00001 #ifndef STK_MODAL_H
00002 #define STK_MODAL_H
00003 
00004 #include "Instrmnt.h"
00005 #include "Envelope.h"
00006 #include "FileLoop.h"
00007 #include "SineWave.h"
00008 #include "BiQuad.h"
00009 #include "OnePole.h"
00010 
00011 namespace stk {
00012 
00013 /***************************************************/
00024 /***************************************************/
00025 
00026 class Modal : public Instrmnt
00027 {
00028 public:
00030 
00033   Modal( unsigned int modes = 4 );
00034 
00036   virtual ~Modal( void );
00037 
00039   void clear( void );
00040 
00042   virtual void setFrequency( StkFloat frequency );
00043 
00045   void setRatioAndRadius( unsigned int modeIndex, StkFloat ratio, StkFloat radius );
00046 
00048   void setMasterGain( StkFloat aGain ) { masterGain_ = aGain; };
00049 
00051   void setDirectGain( StkFloat aGain ) { directGain_ = aGain; };
00052 
00054   void setModeGain( unsigned int modeIndex, StkFloat gain );
00055 
00057   virtual void strike( StkFloat amplitude );
00058 
00060   void damp( StkFloat amplitude );
00061 
00063   void noteOn( StkFloat frequency, StkFloat amplitude );
00064 
00066   void noteOff( StkFloat amplitude );
00067 
00069   virtual void controlChange( int number, StkFloat value ) = 0;
00070 
00072   StkFloat tick( unsigned int channel = 0 );
00073 
00074 protected:
00075 
00076   Envelope envelope_; 
00077   FileWvIn *wave_;
00078   BiQuad **filters_;
00079   OnePole  onepole_;
00080   SineWave vibrato_;
00081 
00082   unsigned int nModes_;
00083   std::vector<StkFloat> ratios_;
00084   std::vector<StkFloat> radii_;
00085 
00086   StkFloat vibratoGain_;
00087   StkFloat masterGain_;
00088   StkFloat directGain_;
00089   StkFloat stickHardness_;
00090   StkFloat strikePosition_;
00091   StkFloat baseFrequency_;
00092 };
00093 
00094 inline StkFloat Modal :: tick( unsigned int )
00095 {
00096   StkFloat temp = masterGain_ * onepole_.tick( wave_->tick() * envelope_.tick() );
00097 
00098   StkFloat temp2 = 0.0;
00099   for ( unsigned int i=0; i<nModes_; i++ )
00100     temp2 += filters_[i]->tick(temp);
00101 
00102   temp2  -= temp2 * directGain_;
00103   temp2 += directGain_ * temp;
00104 
00105   if ( vibratoGain_ != 0.0 ) {
00106     // Calculate AM and apply to master out
00107     temp = 1.0 + ( vibrato_.tick() * vibratoGain_ );
00108     temp2 = temp * temp2;
00109   }
00110     
00111   lastFrame_[0] = temp2;
00112   return lastFrame_[0];
00113 }
00114 
00115 } // stk namespace
00116 
00117 #endif

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