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- /***************************************************/
- /*! \class PercFlut
- \brief STK percussive flute FM synthesis instrument.
-
- This class implements algorithm 4 of the TX81Z.
-
- \code
- Algorithm 4 is : 4->3--\
- 2-- + -->1-->Out
- \endcode
-
- 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--2017.
- */
- /***************************************************/
-
- #include "PercFlut.h"
-
- namespace stk {
-
- PercFlut :: PercFlut( 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, 1.50 * 1.000);
- this->setRatio(1, 3.00 * 0.995);
- this->setRatio(2, 2.99 * 1.005);
- this->setRatio(3, 6.00 * 0.997);
- gains_[0] = fmGains_[99];
- gains_[1] = fmGains_[71];
- gains_[2] = fmGains_[93];
- gains_[3] = fmGains_[85];
-
- adsr_[0]->setAllTimes( 0.05, 0.05, fmSusLevels_[14], 0.05);
- adsr_[1]->setAllTimes( 0.02, 0.50, fmSusLevels_[13], 0.5);
- adsr_[2]->setAllTimes( 0.02, 0.30, fmSusLevels_[11], 0.05);
- adsr_[3]->setAllTimes( 0.02, 0.05, fmSusLevels_[13], 0.01);
-
- twozero_.setGain( 0.0 );
- modDepth_ = 0.005;
- }
-
- PercFlut :: ~PercFlut( void )
- {
- }
-
- void PercFlut :: setFrequency( StkFloat frequency )
- {
- #if defined(_STK_DEBUG_)
- if ( frequency <= 0.0 ) {
- oStream_ << "PercFlut::setFrequency: argument is less than or equal to zero!";
- handleError( StkError::WARNING ); return;
- }
- #endif
-
- baseFrequency_ = frequency;
- }
-
- void PercFlut :: noteOn( StkFloat frequency, StkFloat amplitude )
- {
- gains_[0] = amplitude * fmGains_[99] * 0.5;
- gains_[1] = amplitude * fmGains_[71] * 0.5;
- gains_[2] = amplitude * fmGains_[93] * 0.5;
- gains_[3] = amplitude * fmGains_[85] * 0.5;
- this->setFrequency( frequency );
- this->keyOn();
- }
-
- } // stk namespace
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