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stk::SingWave Class Reference

STK "singing" looped soundfile class. More...

#include <SingWave.h>

Inheritance diagram for stk::SingWave:
stk::Generator stk::Stk

Public Member Functions

 SingWave (std::string fileName, bool raw=false)
 Class constructor taking filename argument. More...
 ~SingWave (void)
 Class destructor.
void reset (void)
 Reset file to beginning.
void normalize (void)
 Normalize the file to a maximum of +-1.0.
void normalize (StkFloat peak)
 Normalize the file to a maximum of +- peak.
void setFrequency (StkFloat frequency)
 Set looping parameters for a particular frequency.
void setVibratoRate (StkFloat rate)
 Set the vibrato frequency in Hz.
void setVibratoGain (StkFloat gain)
 Set the vibrato gain.
void setRandomGain (StkFloat gain)
 Set the random-ness amount.
void setSweepRate (StkFloat rate)
 Set the sweep rate.
void setGainRate (StkFloat rate)
 Set the gain rate.
void setGainTarget (StkFloat target)
 Set the gain target value.
void noteOn (void)
 Start a note.
void noteOff (void)
 Stop a note.
StkFloat lastOut (void) const
 Return the last computed output value.
StkFloat tick (void)
 Compute and return one output sample.
StkFramestick (StkFrames &frames, unsigned int channel=0)
 Fill a channel of the StkFrames object with computed outputs. More...
- Public Member Functions inherited from stk::Generator
 Generator (void)
 Class constructor.
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.
- 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. More...

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. More...
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 "singing" looped soundfile class.

This class loops a specified soundfile and modulates it both periodically and randomly to produce a pitched musical sound, like a simple voice or violin. In general, it is not be used alone because of "munchkinification" effects from pitch shifting. Within STK, it is used as an excitation source for other instruments.

by Perry R. Cook and Gary P. Scavone, 1995–2021.

Constructor & Destructor Documentation

stk::SingWave::SingWave ( std::string  fileName,
bool  raw = false 

Class constructor taking filename argument.

An StkError will be thrown if the file is not found, its format is unknown, or a read error occurs. If the soundfile has no header, the second argument should be true and the file data will be assumed to consist of 16-bit signed integers in big-endian byte order at a sample rate of 22050 Hz.

Member Function Documentation

StkFrames & stk::SingWave::tick ( StkFrames frames,
unsigned int  channel = 0 

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::Generator.

118 {
119 #if defined(_STK_DEBUG_)
120  if ( channel >= frames.channels() ) {
121  oStream_ << "SingWave::tick(): channel and StkFrames arguments are incompatible!";
122  handleError( StkError::FUNCTION_ARGUMENT );
123  }
124 #endif
126  StkFloat *samples = &frames[channel];
127  unsigned int hop = frames.channels();
128  for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
129  *samples = SingWave::tick();
131  return frames;
132 }

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

The Synthesis ToolKit in C++ (STK)
©1995--2021 Perry R. Cook and Gary P. Scavone. All Rights Reserved.