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stk::BandedWG Class Reference

Banded waveguide modeling class. More...

#include <BandedWG.h>

Inheritance diagram for stk::BandedWG:
stk::Instrmnt stk::Stk

List of all members.

Public Member Functions

 BandedWG (void)
 Class constructor.
 ~BandedWG (void)
 Class destructor.
void clear (void)
 Reset and clear all internal state.
void setStrikePosition (StkFloat position)
 Set strike position (0.0 - 1.0).
void setPreset (int preset)
 Select a preset.
void setFrequency (StkFloat frequency)
 Set instrument parameters for a particular frequency.
void startBowing (StkFloat amplitude, StkFloat rate)
 Apply bow velocity/pressure to instrument with given amplitude and rate of increase.
void stopBowing (StkFloat rate)
 Decrease bow velocity/breath pressure with given rate of decrease.
void pluck (StkFloat amp)
 Pluck the instrument with given amplitude.
void noteOn (StkFloat frequency, StkFloat amplitude)
 Start a note with the given frequency and amplitude.
void noteOff (StkFloat amplitude)
 Stop a note with the given amplitude (speed of decay).
void controlChange (int number, StkFloat value)
 Perform the control change specified by number and value (0.0 - 128.0).
StkFloat tick (unsigned int channel=0)
 Compute and return one output sample.
StkFramestick (StkFrames &frames, unsigned int channel=0)
 Fill a channel of the StkFrames object with computed outputs.

Detailed Description

Banded waveguide modeling class.

This class uses banded waveguide techniques to model a variety of sounds, including bowed bars, glasses, and bowls. For more information, see Essl, G. and Cook, P. "Banded Waveguides: Towards Physical Modelling of Bar Percussion Instruments", Proceedings of the 1999 International Computer Music Conference.

Control Change Numbers:

by Georg Essl, 1999 - 2004. Modified for STK 4.0 by Gary Scavone.


Member Function Documentation

StkFrames & stk::BandedWG::tick ( StkFrames frames,
unsigned int  channel = 0 
) [inline, virtual]

Fill a channel of the StkFrames object with computed outputs.

The channel argument must be less than the number of channels in the StkFrames argument (the first channel is specified by 0). However, range checking is only performed if _STK_DEBUG_ is defined during compilation, in which case an out-of-range value will trigger an StkError exception.

Implements stk::Instrmnt.

00125 {
00126   unsigned int nChannels = lastFrame_.channels();
00127 #if defined(_STK_DEBUG_)
00128   if ( channel > frames.channels() - nChannels ) {
00129     oStream_ << "BandedWG::tick(): channel and StkFrames arguments are incompatible!";
00130     handleError( StkError::FUNCTION_ARGUMENT );
00131   }
00132 #endif
00133 
00134   StkFloat *samples = &frames[channel];
00135   unsigned int j, hop = frames.channels() - nChannels;
00136   if ( nChannels == 1 ) {
00137     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
00138       *samples++ = tick();
00139   }
00140   else {
00141     for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
00142       *samples++ = tick();
00143       for ( j=1; j<nChannels; j++ )
00144         *samples++ = lastFrame_[j];
00145     }
00146   }
00147 
00148   return frames;
00149 }


The documentation for this class was generated from the following file:

The Synthesis ToolKit in C++ (STK)
©1995-2012 Perry R. Cook and Gary P. Scavone. All Rights Reserved.