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Version 4.4.3

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This commit is contained in:
Gary Scavone
2013-09-29 23:21:29 +02:00
committed by Stephen Sinclair
parent baca57040b
commit 0aec39260a
223 changed files with 26190 additions and 11130 deletions
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81
src/Plucked.cpp
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@@ -1,11 +1,14 @@
/***************************************************/
/*! \class Plucked
\brief STK plucked string model class.
\brief STK basic plucked string class.
This class implements a simple plucked string
physical model based on the Karplus-Strong
algorithm.
For a more advanced plucked string implementation,
see the stk::Twang class.
This is a digital waveguide model, making its
use possibly subject to patents held by
Stanford University, Yamaha, and others.
@@ -13,7 +16,7 @@
Stanford, bearing the names of Karplus and/or
Strong.
by Perry R. Cook and Gary P. Scavone, 1995 - 2010.
by Perry R. Cook and Gary P. Scavone, 1995-2011.
*/
/***************************************************/
@@ -23,11 +26,15 @@ namespace stk {
Plucked :: Plucked( StkFloat lowestFrequency )
{
length_ = (unsigned long) ( Stk::sampleRate() / lowestFrequency + 1 );
loopGain_ = 0.999;
delayLine_.setMaximumDelay( length_ );
delayLine_.setDelay( 0.5 * length_ );
this->clear();
if ( lowestFrequency <= 0.0 ) {
oStream_ << "Plucked::Plucked: argument is less than or equal to zero!";
handleError( StkError::FUNCTION_ARGUMENT );
}
unsigned long delays = (unsigned long) ( Stk::sampleRate() / lowestFrequency );
delayLine_.setMaximumDelay( delays + 1 );
this->setFrequency( 220.0 );
}
Plucked :: ~Plucked( void )
@@ -43,42 +50,31 @@ void Plucked :: clear( void )
void Plucked :: setFrequency( StkFloat frequency )
{
StkFloat freakency = frequency;
#if defined(_STK_DEBUG_)
if ( frequency <= 0.0 ) {
errorString_ << "Plucked::setFrequency: parameter is less than or equal to zero!";
handleError( StkError::WARNING );
freakency = 220.0;
oStream_ << "Plucked::setFrequency: argument is less than or equal to zero!";
handleError( StkError::WARNING ); return;
}
#endif
// Delay = length - approximate filter delay.
StkFloat delay = (Stk::sampleRate() / freakency) - 0.5;
if ( delay <= 0.0 )
delay = 0.3;
else if ( delay > length_ )
delay = length_;
// Delay = length - filter delay.
StkFloat delay = ( Stk::sampleRate() / frequency ) - loopFilter_.phaseDelay( frequency );
delayLine_.setDelay( delay );
loopGain_ = 0.995 + (freakency * 0.000005);
loopGain_ = 0.995 + (frequency * 0.000005);
if ( loopGain_ >= 1.0 ) loopGain_ = 0.99999;
}
void Plucked :: pluck( StkFloat amplitude )
{
StkFloat gain = amplitude;
if ( gain > 1.0 ) {
errorString_ << "Plucked::pluck: amplitude is greater than 1.0 ... setting to 1.0!";
handleError( StkError::WARNING );
gain = 1.0;
}
else if ( gain < 0.0 ) {
errorString_ << "Plucked::pluck: amplitude is < 0.0 ... setting to 0.0!";
handleError( StkError::WARNING );
gain = 0.0;
if ( amplitude < 0.0 || amplitude > 1.0 ) {
oStream_ << "Plucked::pluck: amplitude is out of range!";
handleError( StkError::WARNING ); return;
}
pickFilter_.setPole( 0.999 - (gain * 0.15) );
pickFilter_.setGain( gain * 0.5 );
for (unsigned long i=0; i<length_; i++)
pickFilter_.setPole( 0.999 - (amplitude * 0.15) );
pickFilter_.setGain( amplitude * 0.5 );
for ( unsigned long i=0; i<delayLine_.getDelay(); i++ )
// Fill delay with noise additively with current contents.
delayLine_.tick( 0.6 * delayLine_.lastOut() + pickFilter_.tick( noise_.tick() ) );
}
@@ -87,31 +83,16 @@ void Plucked :: noteOn( StkFloat frequency, StkFloat amplitude )
{
this->setFrequency( frequency );
this->pluck( amplitude );
#if defined(_STK_DEBUG_)
errorString_ << "Plucked::NoteOn: frequency = " << frequency << ", amplitude = " << amplitude << ".";
handleError( StkError::DEBUG_WARNING );
#endif
}
void Plucked :: noteOff( StkFloat amplitude )
{
loopGain_ = 1.0 - amplitude;
if ( loopGain_ < 0.0 ) {
errorString_ << "Plucked::noteOff: amplitude is greater than 1.0 ... setting to 1.0!";
handleError( StkError::WARNING );
loopGain_ = 0.0;
}
else if ( loopGain_ > 1.0 ) {
errorString_ << "Plucked::noteOff: amplitude is < 0.0 ... setting to 0.0!";
handleError( StkError::WARNING );
loopGain_ = (StkFloat) 0.99999;
if ( amplitude < 0.0 || amplitude > 1.0 ) {
oStream_ << "Plucked::noteOff: amplitude is out of range!";
handleError( StkError::WARNING ); return;
}
#if defined(_STK_DEBUG_)
errorString_ << "Plucked::NoteOff: amplitude = " << amplitude << ".";
handleError( StkError::DEBUG_WARNING );
#endif
loopGain_ = 1.0 - amplitude;
}
} // stk namespace