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STK Wurlitzer electric piano FM synthesis instrument. More...
#include <Wurley.h>
Public Member Functions | |
Wurley (void) | |
Class constructor. | |
~Wurley (void) | |
Class destructor. | |
void | setFrequency (StkFloat frequency) |
Set instrument parameters for a particular frequency. | |
void | noteOn (StkFloat frequency, StkFloat amplitude) |
Start a note with the given frequency and amplitude. | |
StkFloat | tick (unsigned int channel=0) |
Compute and return one output sample. | |
StkFrames & | tick (StkFrames &frames, unsigned int channel=0) |
Fill a channel of the StkFrames object with computed outputs. |
STK Wurlitzer electric piano FM synthesis instrument.
This class implements two simple FM Pairs summed together, also referred to as algorithm 5 of the TX81Z.
Algorithm 5 is : 4->3--\ + --> Out 2->1--/
Control Change Numbers:
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, 1995-2011.
stk::Wurley::Wurley | ( | void | ) |
Class constructor.
An StkError will be thrown if the rawwave path is incorrectly set.
Fill a channel of the StkFrames object with computed outputs.
The channel
argument must be less than the number of channels in the StkFrames argument (the first channel is specified by 0). However, range checking is only performed if _STK_DEBUG_ is defined during compilation, in which case an out-of-range value will trigger an StkError exception.
Implements stk::FM.
00100 { 00101 unsigned int nChannels = lastFrame_.channels(); 00102 #if defined(_STK_DEBUG_) 00103 if ( channel > frames.channels() - nChannels ) { 00104 oStream_ << "Wurley::tick(): channel and StkFrames arguments are incompatible!"; 00105 handleError( StkError::FUNCTION_ARGUMENT ); 00106 } 00107 #endif 00108 00109 StkFloat *samples = &frames[channel]; 00110 unsigned int j, hop = frames.channels() - nChannels; 00111 if ( nChannels == 1 ) { 00112 for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) 00113 *samples++ = tick(); 00114 } 00115 else { 00116 for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) { 00117 *samples++ = tick(); 00118 for ( j=1; j<nChannels; j++ ) 00119 *samples++ = lastFrame_[j]; 00120 } 00121 } 00122 00123 return frames; 00124 }
The Synthesis ToolKit in C++ (STK) |
©1995-2011 Perry R. Cook and Gary P. Scavone. All Rights Reserved. |