mirror of
https://github.com/thestk/stk
synced 2026-01-11 20:11:52 +00:00
80 lines
2.0 KiB
C++
80 lines
2.0 KiB
C++
/***************************************************/
|
|
/*! \class BeeThree
|
|
\brief STK Hammond-oid organ FM synthesis instrument.
|
|
|
|
This class implements a simple 4 operator
|
|
topology, also referred to as algorithm 8 of
|
|
the TX81Z.
|
|
|
|
\code
|
|
Algorithm 8 is :
|
|
1 --.
|
|
2 -\|
|
|
+-> Out
|
|
3 -/|
|
|
4 --
|
|
\endcode
|
|
|
|
Control Change Numbers:
|
|
- Operator 4 (feedback) Gain = 2
|
|
- Operator 3 Gain = 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--2014.
|
|
*/
|
|
/***************************************************/
|
|
|
|
#include "BeeThree.h"
|
|
|
|
namespace stk {
|
|
|
|
BeeThree :: BeeThree( 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, 0.999 );
|
|
this->setRatio( 1, 1.997 );
|
|
this->setRatio( 2, 3.006 );
|
|
this->setRatio( 3, 6.009 );
|
|
|
|
gains_[0] = fmGains_[95];
|
|
gains_[1] = fmGains_[95];
|
|
gains_[2] = fmGains_[99];
|
|
gains_[3] = fmGains_[95];
|
|
|
|
adsr_[0]->setAllTimes( 0.005, 0.003, 1.0, 0.01 );
|
|
adsr_[1]->setAllTimes( 0.005, 0.003, 1.0, 0.01 );
|
|
adsr_[2]->setAllTimes( 0.005, 0.003, 1.0, 0.01 );
|
|
adsr_[3]->setAllTimes( 0.005, 0.001, 0.4, 0.03 );
|
|
|
|
twozero_.setGain( 0.1 );
|
|
}
|
|
|
|
BeeThree :: ~BeeThree( void )
|
|
{
|
|
}
|
|
|
|
void BeeThree :: noteOn( StkFloat frequency, StkFloat amplitude )
|
|
{
|
|
gains_[0] = amplitude * fmGains_[95];
|
|
gains_[1] = amplitude * fmGains_[95];
|
|
gains_[2] = amplitude * fmGains_[99];
|
|
gains_[3] = amplitude * fmGains_[95];
|
|
this->setFrequency( frequency );
|
|
this->keyOn();
|
|
}
|
|
|
|
} // stk namespace
|