mirror of
https://github.com/thestk/stk
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Version 4.2.0
This commit is contained in:
Gary Scavone
committed by
Stephen Sinclair
Stephen Sinclair
parent
cf06b7598b
commit
a6381b9d38
112
src/Sitar.cpp
112
src/Sitar.cpp
@@ -13,105 +13,113 @@
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Stanford, bearing the names of Karplus and/or
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Strong.
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by Perry R. Cook and Gary P. Scavone, 1995 - 2002.
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by Perry R. Cook and Gary P. Scavone, 1995 - 2004.
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*/
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/***************************************************/
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#include "Sitar.h"
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#include <math.h>
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Sitar :: Sitar(MY_FLOAT lowestFrequency)
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Sitar :: Sitar(StkFloat lowestFrequency)
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{
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length = (long) (Stk::sampleRate() / lowestFrequency + 1);
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loopGain = (MY_FLOAT) 0.999;
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delayLine = new DelayA( (MY_FLOAT)(length / 2.0), length );
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delay = length / 2.0;
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targetDelay = delay;
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unsigned long length = (unsigned long) (Stk::sampleRate() / lowestFrequency + 1);
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delayLine_.setMaximumDelay( length );
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delay_ = 0.5 * length;
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delayLine_.setDelay( delay_ );
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targetDelay_ = delay_;
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loopFilter = new OneZero;
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loopFilter->setZero(0.01);
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loopFilter_.setZero(0.01);
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loopGain_ = 0.999;
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envelope = new ADSR();
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envelope->setAllTimes(0.001, 0.04, 0.0, 0.5);
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noise = new Noise;
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envelope_.setAllTimes(0.001, 0.04, 0.0, 0.5);
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this->clear();
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}
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Sitar :: ~Sitar()
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{
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delete delayLine;
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delete loopFilter;
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delete noise;
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delete envelope;
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}
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void Sitar :: clear()
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{
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delayLine->clear();
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loopFilter->clear();
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delayLine_.clear();
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loopFilter_.clear();
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}
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void Sitar :: setFrequency(MY_FLOAT frequency)
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void Sitar :: setFrequency(StkFloat frequency)
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{
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MY_FLOAT freakency = frequency;
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StkFloat freakency = frequency;
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if ( frequency <= 0.0 ) {
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std::cerr << "Sitar: setFrequency parameter is less than or equal to zero!" << std::endl;
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errorString_ << "Sitar::setFrequency: parameter is less than or equal to zero!";
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handleError( StkError::WARNING );
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freakency = 220.0;
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}
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targetDelay = (Stk::sampleRate() / freakency);
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delay = targetDelay * (1.0 + (0.05 * noise->tick()));
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delayLine->setDelay(delay);
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loopGain = 0.995 + (freakency * 0.0000005);
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if (loopGain > 0.9995) loopGain = 0.9995;
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targetDelay_ = (Stk::sampleRate() / freakency);
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delay_ = targetDelay_ * (1.0 + (0.05 * noise_.tick()));
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delayLine_.setDelay( delay_ );
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loopGain_ = 0.995 + (freakency * 0.0000005);
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if ( loopGain_ > 0.9995 ) loopGain_ = 0.9995;
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}
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void Sitar :: pluck(MY_FLOAT amplitude)
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void Sitar :: pluck(StkFloat amplitude)
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{
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envelope->keyOn();
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envelope_.keyOn();
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}
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void Sitar :: noteOn(MY_FLOAT frequency, MY_FLOAT amplitude)
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void Sitar :: noteOn(StkFloat frequency, StkFloat amplitude)
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{
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setFrequency(frequency);
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pluck(amplitude);
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amGain = 0.1 * amplitude;
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this->setFrequency( frequency );
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this->pluck( amplitude );
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amGain_ = 0.1 * amplitude;
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#if defined(_STK_DEBUG_)
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std::cerr << "Sitar: NoteOn frequency = " << frequency << ", amplitude = " << amplitude << std::endl;
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errorString_ << "Sitar::NoteOn: frequency = " << frequency << ", amplitude = " << amplitude << ".";
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handleError( StkError::DEBUG_WARNING );
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#endif
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}
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void Sitar :: noteOff(MY_FLOAT amplitude)
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void Sitar :: noteOff(StkFloat amplitude)
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{
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loopGain = (MY_FLOAT) 1.0 - amplitude;
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if ( loopGain < 0.0 ) {
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std::cerr << "Plucked: noteOff amplitude greater than 1.0!" << std::endl;
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loopGain = 0.0;
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loopGain_ = (StkFloat) 1.0 - amplitude;
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if ( loopGain_ < 0.0 ) {
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errorString_ << "Sitar::noteOff: amplitude is greater than 1.0 ... setting to 1.0!";
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handleError( StkError::WARNING );
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loopGain_ = 0.0;
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}
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else if ( loopGain > 1.0 ) {
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std::cerr << "Plucked: noteOff amplitude less than or zero!" << std::endl;
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loopGain = (MY_FLOAT) 0.99999;
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else if ( loopGain_ > 1.0 ) {
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errorString_ << "Sitar::noteOff: amplitude is < 0.0 ... setting to 0.0!";
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handleError( StkError::WARNING );
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loopGain_ = 0.99999;
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}
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#if defined(_STK_DEBUG_)
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std::cerr << "Plucked: NoteOff amplitude = " << amplitude << std::endl;
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errorString_ << "Sitar::NoteOff: amplitude = " << amplitude << ".";
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handleError( StkError::DEBUG_WARNING );
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#endif
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}
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MY_FLOAT Sitar :: tick()
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StkFloat Sitar :: tick()
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{
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if ( fabs(targetDelay - delay) > 0.001 ) {
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if (targetDelay < delay)
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delay *= 0.99999;
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if ( fabs(targetDelay_ - delay_) > 0.001 ) {
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if ( targetDelay_ < delay_ )
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delay_ *= 0.99999;
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else
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delay *= 1.00001;
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delayLine->setDelay(delay);
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delay_ *= 1.00001;
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delayLine_.setDelay( delay_ );
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}
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lastOutput = delayLine->tick( loopFilter->tick( delayLine->lastOut() * loopGain ) +
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(amGain * envelope->tick() * noise->tick()));
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lastOutput_ = delayLine_.tick( loopFilter_.tick( delayLine_.lastOut() * loopGain_ ) +
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(amGain_ * envelope_.tick() * noise_.tick()));
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return lastOutput;
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return lastOutput_;
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}
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StkFloat *Sitar :: tick(StkFloat *vector, unsigned int vectorSize)
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{
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return Instrmnt::tick( vector, vectorSize );
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}
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StkFrames& Sitar :: tick( StkFrames& frames, unsigned int channel )
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{
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return Instrmnt::tick( frames, channel );
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}
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