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HevyMetl.cpp
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HevyMetl.cpp
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/***************************************************/
/*! \class HevyMetl
\brief STK heavy metal FM synthesis instrument.
This class implements 3 cascade operators with
feedback modulation, also referred to as
algorithm 3 of the TX81Z.
Algorithm 3 is : 4--\
3-->2-- + -->1-->Out
Control Change Numbers:
- Total Modulator Index = 2
- Modulator Crossfade = 4
- LFO Speed = 11
- LFO Depth = 1
- ADSR 2 & 4 Target = 128
The basic Chowning/Stanford FM patent expired
in 1995, but there exist follow-on patents,
mostly assigned to Yamaha. If you are of the
type who should worry about this (making
money) worry away.
by Perry R. Cook and Gary P. Scavone, 1995--2023.
*/
/***************************************************/
#include "HevyMetl.h"
namespace stk {
HevyMetl :: HevyMetl( void )
: FM()
{
// Concatenate the STK rawwave path to the rawwave files
for ( unsigned int i=0; i<3; i++ )
waves_[i] = new FileLoop( (Stk::rawwavePath() + "sinewave.raw").c_str(), true );
waves_[3] = new FileLoop( (Stk::rawwavePath() + "fwavblnk.raw").c_str(), true );
this->setRatio(0, 1.0 * 1.000);
this->setRatio(1, 4.0 * 0.999);
this->setRatio(2, 3.0 * 1.001);
this->setRatio(3, 0.5 * 1.002);
gains_[0] = fmGains_[92];
gains_[1] = fmGains_[76];
gains_[2] = fmGains_[91];
gains_[3] = fmGains_[68];
adsr_[0]->setAllTimes( 0.001, 0.001, 1.0, 0.01);
adsr_[1]->setAllTimes( 0.001, 0.010, 1.0, 0.50);
adsr_[2]->setAllTimes( 0.010, 0.005, 1.0, 0.20);
adsr_[3]->setAllTimes( 0.030, 0.010, 0.2, 0.20);
twozero_.setGain( 2.0 );
vibrato_.setFrequency( 5.5 );
modDepth_ = 0.0;
}
HevyMetl :: ~HevyMetl( void )
{
}
void HevyMetl :: noteOn( StkFloat frequency, StkFloat amplitude )
{
gains_[0] = amplitude * fmGains_[92];
gains_[1] = amplitude * fmGains_[76];
gains_[2] = amplitude * fmGains_[91];
gains_[3] = amplitude * fmGains_[68];
this->setFrequency( frequency );
this->keyOn();
}
} // stk namespace