mirror of
https://github.com/thestk/stk
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125 lines
3.4 KiB
C++
125 lines
3.4 KiB
C++
/***************************************************/
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/*! \class BandedWG
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\brief Banded waveguide modeling class.
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This class uses banded waveguide techniques to
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model a variety of sounds, including bowed
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bars, glasses, and bowls. For more
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information, see Essl, G. and Cook, P. "Banded
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Waveguides: Towards Physical Modelling of Bar
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Percussion Instruments", Proceedings of the
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1999 International Computer Music Conference.
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Control Change Numbers:
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- Bow Pressure = 2
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- Bow Motion = 4
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- Strike Position = 8 (not implemented)
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- Vibrato Frequency = 11
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- Gain = 1
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- Bow Velocity = 128
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- Set Striking = 64
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- Instrument Presets = 16
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- Uniform Bar = 0
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- Tuned Bar = 1
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- Glass Harmonica = 2
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- Tibetan Bowl = 3
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by Georg Essl, 1999 - 2004.
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Modified for Stk 4.0 by Gary Scavone.
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*/
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/***************************************************/
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#ifndef STK_BANDEDWG_H
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#define STK_BANDEDWG_H
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const int MAX_BANDED_MODES = 20;
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#include "Instrmnt.h"
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#include "DelayL.h"
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#include "BowTable.h"
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#include "ADSR.h"
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#include "BiQuad.h"
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class BandedWG : public Instrmnt
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{
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public:
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//! Class constructor.
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BandedWG();
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//! Class destructor.
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~BandedWG();
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//! Reset and clear all internal state.
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void clear();
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//! Set strike position (0.0 - 1.0).
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void setStrikePosition(StkFloat position);
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//! Select a preset.
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void setPreset(int preset);
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//! Set instrument parameters for a particular frequency.
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void setFrequency(StkFloat frequency);
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//! Apply bow velocity/pressure to instrument with given amplitude and rate of increase.
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void startBowing(StkFloat amplitude, StkFloat rate);
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//! Decrease bow velocity/breath pressure with given rate of decrease.
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void stopBowing(StkFloat rate);
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//! Pluck the instrument with given amplitude.
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void pluck(StkFloat amp);
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//! Start a note with the given frequency and amplitude.
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void noteOn(StkFloat frequency, StkFloat amplitude);
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//! Stop a note with the given amplitude (speed of decay).
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void noteOff(StkFloat amplitude);
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//! Compute one output sample.
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StkFloat tick();
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//! Computer \e vectorSize outputs and return them in \e vector.
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StkFloat *tick(StkFloat *vector, unsigned int vectorSize);
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//! Fill a channel of the StkFrames object with computed outputs.
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/*!
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The \c channel argument should be one or greater (the first
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channel is specified by 1). An StkError will be thrown if the \c
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channel argument is zero or it is greater than the number of
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channels in the StkFrames object.
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*/
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StkFrames& tick( StkFrames& frames, unsigned int channel = 1 );
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//! Perform the control change specified by \e number and \e value (0.0 - 128.0).
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void controlChange(int number, StkFloat value);
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protected:
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bool doPluck_;
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bool trackVelocity_;
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int nModes_;
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int presetModes_;
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BowTable bowTable_;
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ADSR adsr_;
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BiQuad bandpass_[MAX_BANDED_MODES];
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DelayL delay_[MAX_BANDED_MODES];
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StkFloat maxVelocity_;
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StkFloat modes_[MAX_BANDED_MODES];
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StkFloat frequency_;
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StkFloat baseGain_;
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StkFloat gains_[MAX_BANDED_MODES];
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StkFloat basegains_[MAX_BANDED_MODES];
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StkFloat excitation_[MAX_BANDED_MODES];
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StkFloat integrationConstant_;
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StkFloat velocityInput_;
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StkFloat bowVelocity_;
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StkFloat bowTarget_;
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StkFloat bowPosition_;
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StkFloat strikeAmp_;
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int strikePosition_;
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};
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#endif
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