Version 4.0

include/PluckTwo.h

@@ -0,0 +1,84 @@
+/***************************************************/
+/*! \class PluckTwo
+    \brief STK enhanced plucked string model class.
+
+    This class implements an enhanced two-string,
+    plucked physical model, a la Jaffe-Smith,
+    Smith, and others.
+
+    PluckTwo is an abstract class, with no excitation
+    specified.  Therefore, it can't be directly
+    instantiated.
+
+    This is a digital waveguide model, making its
+    use possibly subject to patents held by
+    Stanford University, Yamaha, and others.
+
+    by Perry R. Cook and Gary P. Scavone, 1995 - 2002.
+*/
+/***************************************************/
+
+#if !defined(__PLUCKTWO_H)
+#define __PLUCKTWO_H
+
+#include "Instrmnt.h"
+#include "DelayL.h"
+#include "DelayA.h"
+#include "OneZero.h"
+
+class PluckTwo : public Instrmnt
+{
+ public:
+  //! Class constructor, taking the lowest desired playing frequency.
+  PluckTwo(MY_FLOAT lowestFrequency);
+
+  //! Class destructor.
+  virtual ~PluckTwo();
+
+  //! Reset and clear all internal state.
+  void clear();
+
+  //! Set instrument parameters for a particular frequency.
+  virtual void setFrequency(MY_FLOAT frequency);
+
+  //! Detune the two strings by the given factor.  A value of 1.0 produces unison strings.
+  void setDetune(MY_FLOAT detune);
+
+  //! Efficient combined setting of frequency and detuning.
+  void setFreqAndDetune(MY_FLOAT frequency, MY_FLOAT detune);
+
+  //! Set the pluck or "excitation" position along the string (0.0 - 1.0).
+  void setPluckPosition(MY_FLOAT position);
+
+  //! Set the base loop gain.
+  /*!
+    The actual loop gain is set according to the frequency.
+    Because of high-frequency loop filter roll-off, higher
+    frequency settings have greater loop gains.
+  */
+  void setBaseLoopGain(MY_FLOAT aGain);
+
+  //! Stop a note with the given amplitude (speed of decay).
+  virtual void noteOff(MY_FLOAT amplitude);
+
+  //! Virtual (abstract) tick function is implemented by subclasses.
+  virtual MY_FLOAT tick() = 0;
+
+  protected:  
+    DelayA *delayLine;
+    DelayA *delayLine2;
+    DelayL *combDelay;
+    OneZero *filter;
+    OneZero *filter2;
+    long length;
+    MY_FLOAT loopGain;
+    MY_FLOAT baseLoopGain;
+    MY_FLOAT lastFrequency;
+    MY_FLOAT lastLength;
+    MY_FLOAT detuning;
+    MY_FLOAT pluckAmplitude;
+    MY_FLOAT pluckPosition;
+
+};
+
+#endif