The Synthesis ToolKit in C++ (STK)

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FMVoices.h
1 #ifndef STK_FMVOICES_H
2 #define STK_FMVOICES_H
3
4 #include "FM.h"
5
6 namespace stk {
7
8 /***************************************************/
38 /***************************************************/
39
40 class FMVoices : public FM
41 {
42 public:
44
47 FMVoices( void );
48
50 ~FMVoices( void );
51
53 void setFrequency( StkFloat frequency );
54
56 void noteOn( StkFloat frequency, StkFloat amplitude );
57
59 void controlChange( int number, StkFloat value );
60
62 StkFloat tick( unsigned int channel = 0 );
63
65
72 StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
73
74 protected:
75
76 int currentVowel_;
77 StkFloat tilt_[3];
78 StkFloat mods_[3];
79 };
80
81 inline StkFloat FMVoices :: tick( unsigned int )
82 {
83 StkFloat temp, temp2;
84
85 temp = gains_[3] * adsr_[3]->tick() * waves_[3]->tick();
86 temp2 = vibrato_.tick() * modDepth_ * 0.1;
87
88 waves_[0]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[0]);
89 waves_[1]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[1]);
90 waves_[2]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[2]);
91 waves_[3]->setFrequency(baseFrequency_ * (1.0 + temp2) * ratios_[3]);
92
93 waves_[0]->addPhaseOffset(temp * mods_[0]);
94 waves_[1]->addPhaseOffset(temp * mods_[1]);
95 waves_[2]->addPhaseOffset(temp * mods_[2]);
96 waves_[3]->addPhaseOffset( twozero_.lastOut() );
97 twozero_.tick( temp );
98 temp = gains_[0] * tilt_[0] * adsr_[0]->tick() * waves_[0]->tick();
99 temp += gains_[1] * tilt_[1] * adsr_[1]->tick() * waves_[1]->tick();
100 temp += gains_[2] * tilt_[2] * adsr_[2]->tick() * waves_[2]->tick();
101
102 lastFrame_[0] = temp * 0.33;
103 return lastFrame_[0];
104 }
105
106 inline StkFrames& FMVoices :: tick( StkFrames& frames, unsigned int channel )
107 {
108 unsigned int nChannels = lastFrame_.channels();
109 #if defined(_STK_DEBUG_)
110 if ( channel > frames.channels() - nChannels ) {
111 oStream_ << "FMVoices::tick(): channel and StkFrames arguments are incompatible!";
112 handleError( StkError::FUNCTION_ARGUMENT );
113 }
114 #endif
115
116 StkFloat *samples = &frames[channel];
117 unsigned int j, hop = frames.channels() - nChannels;
118 if ( nChannels == 1 ) {
119 for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
120 *samples++ = tick();
121 }
122 else {
123 for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
124 *samples++ = tick();
125 for ( j=1; j<nChannels; j++ )
126 *samples++ = lastFrame_[j];
127 }
128 }
129
130 return frames;
131 }
132
133 } // stk namespace
134
135 #endif
stk::FMVoices
STK singing FM synthesis instrument.
Definition: FMVoices.h:41
stk::FMVoices::controlChange
void controlChange(int number, StkFloat value)
Perform the control change specified by number and value (0.0 - 128.0).
stk::TwoZero::tick
StkFloat tick(StkFloat input)
Input one sample to the filter and return one output.
Definition: TwoZero.h:92
stk::StkFrames::frames
unsigned int frames(void) const
Return the number of sample frames represented by the data.
Definition: Stk.h:407
stk::FM
STK abstract FM synthesis base class.
Definition: FM.h:38
stk::StkFrames
An STK class to handle vectorized audio data.
Definition: Stk.h:276
stk::FMVoices::tick
StkFloat tick(unsigned int channel=0)
Compute and return one output sample.
Definition: FMVoices.h:81
stk::SineWave::tick
StkFloat tick(void)
Compute and return one output sample.
Definition: SineWave.h:99
stk::TwoZero::lastOut
StkFloat lastOut(void) const
Return the last computed output value.
Definition: TwoZero.h:60
stk::StkFrames::channels
unsigned int channels(void) const
Return the number of channels represented by the data.
Definition: Stk.h:404
stk::Stk::handleError
static void handleError(const char *message, StkError::Type type)
Static function for error reporting and handling using c-strings.
stk::FMVoices::~FMVoices
~FMVoices(void)
Class destructor.
stk::FMVoices::FMVoices
FMVoices(void)
Class constructor.
stk
The STK namespace.
Definition: ADSR.h:6
stk::FMVoices::noteOn
void noteOn(StkFloat frequency, StkFloat amplitude)
Start a note with the given frequency and amplitude.
stk::FMVoices::setFrequency
void setFrequency(StkFloat frequency)
Set instrument parameters for a particular frequency.

The Synthesis ToolKit in C++ (STK)
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