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stk::Saxofony Class Reference

STK faux conical bore reed instrument class. More...

#include <Saxofony.h>

Inheritance diagram for stk::Saxofony:
stk::Instrmnt stk::Stk

Public Member Functions

 Saxofony (StkFloat lowestFrequency)
 Class constructor, taking the lowest desired playing frequency.
 
 ~Saxofony (void)
 Class destructor.
 
void clear (void)
 Reset and clear all internal state.
 
void setFrequency (StkFloat frequency)
 Set instrument parameters for a particular frequency.
 
void setBlowPosition (StkFloat aPosition)
 Set the "blowing" position between the air column terminations (0.0 - 1.0).
 
void startBlowing (StkFloat amplitude, StkFloat rate)
 Apply breath pressure to instrument with given amplitude and rate of increase.
 
void stopBlowing (StkFloat rate)
 Decrease breath pressure with given rate of decrease.
 
void noteOn (StkFloat frequency, StkFloat amplitude)
 Start a note with the given frequency and amplitude.
 
void noteOff (StkFloat amplitude)
 Stop a note with the given amplitude (speed of decay).
 
void controlChange (int number, StkFloat value)
 Perform the control change specified by number and value (0.0 - 128.0).
 
StkFloat tick (unsigned int channel=0)
 Compute and return one output sample.
 
StkFramestick (StkFrames &frames, unsigned int channel=0)
 Fill a channel of the StkFrames object with computed outputs.
 
- Public Member Functions inherited from stk::Instrmnt
 Instrmnt (void)
 Class constructor.
 
virtual void clear (void)
 Reset and clear all internal state (for subclasses).
 
virtual void noteOn (StkFloat frequency, StkFloat amplitude)=0
 Start a note with the given frequency and amplitude.
 
virtual void noteOff (StkFloat amplitude)=0
 Stop a note with the given amplitude (speed of decay).
 
virtual void setFrequency (StkFloat frequency)
 Set instrument parameters for a particular frequency.
 
virtual void controlChange (int number, StkFloat value)
 Perform the control change specified by number and value (0.0 - 128.0).
 
unsigned int channelsOut (void) const
 Return the number of output channels for the class.
 
const StkFrameslastFrame (void) const
 Return an StkFrames reference to the last output sample frame.
 
StkFloat lastOut (unsigned int channel=0)
 Return the specified channel value of the last computed frame.
 
virtual StkFloat tick (unsigned int channel=0)=0
 Compute one sample frame and return the specified channel value.
 
virtual StkFramestick (StkFrames &frames, unsigned int channel=0)=0
 Fill the StkFrames object with computed sample frames, starting at the specified channel.
 
- Public Member Functions inherited from stk::Stk
void ignoreSampleRateChange (bool ignore=true)
 A function to enable/disable the automatic updating of class data when the STK sample rate changes.
 

Additional Inherited Members

- Static Public Member Functions inherited from stk::Stk
static StkFloat sampleRate (void)
 Static method that returns the current STK sample rate.
 
static void setSampleRate (StkFloat rate)
 Static method that sets the STK sample rate.
 
static void clear_alertList ()
 Static method that frees memory from alertList_.
 
static std::string rawwavePath (void)
 Static method that returns the current rawwave path.
 
static void setRawwavePath (std::string path)
 Static method that sets the STK rawwave path.
 
static void swap16 (unsigned char *ptr)
 Static method that byte-swaps a 16-bit data type.
 
static void swap32 (unsigned char *ptr)
 Static method that byte-swaps a 32-bit data type.
 
static void swap64 (unsigned char *ptr)
 Static method that byte-swaps a 64-bit data type.
 
static void sleep (unsigned long milliseconds)
 Static cross-platform method to sleep for a number of milliseconds.
 
static bool inRange (StkFloat value, StkFloat min, StkFloat max)
 Static method to check whether a value is within a specified range.
 
static void handleError (const char *message, StkError::Type type)
 Static function for error reporting and handling using c-strings.
 
static void handleError (std::string message, StkError::Type type)
 Static function for error reporting and handling using c++ strings.
 
static void showWarnings (bool status)
 Toggle display of WARNING and STATUS messages.
 
static void printErrors (bool status)
 Toggle display of error messages before throwing exceptions.
 
- Static Public Attributes inherited from stk::Stk
static const StkFormat STK_SINT8
 
static const StkFormat STK_SINT16
 
static const StkFormat STK_SINT24
 
static const StkFormat STK_SINT32
 
static const StkFormat STK_FLOAT32
 
static const StkFormat STK_FLOAT64
 
- Protected Member Functions inherited from stk::Stk
 Stk (void)
 Default constructor.
 
virtual ~Stk (void)
 Class destructor.
 
virtual void sampleRateChanged (StkFloat newRate, StkFloat oldRate)
 This function should be implemented in subclasses that depend on the sample rate.
 
void addSampleRateAlert (Stk *ptr)
 Add class pointer to list for sample rate change notification.
 
void removeSampleRateAlert (Stk *ptr)
 Remove class pointer from list for sample rate change notification.
 
void handleError (StkError::Type type) const
 Internal function for error reporting that assumes message in oStream_ variable.
 

Detailed Description

STK faux conical bore reed instrument class.

This class implements a "hybrid" digital waveguide instrument that can generate a variety of wind-like sounds. It has also been referred to as the "blowed string" model. The waveguide section is essentially that of a string, with one rigid and one lossy termination. The non-linear function is a reed table. The string can be "blown" at any point between the terminations, though just as with strings, it is impossible to excite the system at either end. If the excitation is placed at the string mid-point, the sound is that of a clarinet. At points closer to the "bridge", the sound is closer to that of a saxophone. See Scavone (2002) for more details.

This is a digital waveguide model, making its use possibly subject to patents held by Stanford University, Yamaha, and others.

Control Change Numbers:

by Perry R. Cook and Gary P. Scavone, 1995–2023.

Constructor & Destructor Documentation

◆ Saxofony()

stk::Saxofony::Saxofony ( StkFloat  lowestFrequency)

Class constructor, taking the lowest desired playing frequency.

An StkError will be thrown if the rawwave path is incorrectly set.

Member Function Documentation

◆ tick()

StkFrames & stk::Saxofony::tick ( StkFrames frames,
unsigned int  channel = 0 
)
inlinevirtual

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::Instrmnt.

138{
139 unsigned int nChannels = lastFrame_.channels();
140#if defined(_STK_DEBUG_)
141 if ( channel > frames.channels() - nChannels ) {
142 oStream_ << "Saxofony::tick(): channel and StkFrames arguments are incompatible!";
143 handleError( StkError::FUNCTION_ARGUMENT );
144 }
145#endif
146
147 StkFloat *samples = &frames[channel];
148 unsigned int j, hop = frames.channels() - nChannels;
149 if ( nChannels == 1 ) {
150 for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
151 *samples++ = tick();
152 }
153 else {
154 for ( unsigned int i=0; i<frames.frames(); i++, samples += hop ) {
155 *samples++ = tick();
156 for ( j=1; j<nChannels; j++ )
157 *samples++ = lastFrame_[j];
158 }
159 }
160
161 return frames;
162}
StkFloat tick(unsigned int channel=0)
Compute and return one output sample.
Definition Saxofony.h:116
unsigned int channels(void) const
Return the number of channels represented by the data.
Definition Stk.h:416
static void handleError(const char *message, StkError::Type type)
Static function for error reporting and handling using c-strings.

The documentation for this class was generated from the following file:

The Synthesis ToolKit in C++ (STK)
©1995--2023 Perry R. Cook and Gary P. Scavone. All Rights Reserved.