mirror of
https://github.com/thestk/stk
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93 lines
2.1 KiB
C++
93 lines
2.1 KiB
C++
#ifndef STK_SIMPLE_H
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#define STK_SIMPLE_H
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#include "Instrmnt.h"
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#include "ADSR.h"
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#include "FileLoop.h"
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#include "OnePole.h"
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#include "BiQuad.h"
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#include "Noise.h"
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namespace stk {
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/***************************************************/
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/*! \class Simple
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\brief STK wavetable/noise instrument.
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This class combines a looped wave, a
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noise source, a biquad resonance filter,
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a one-pole filter, and an ADSR envelope
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to create some interesting sounds.
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Control Change Numbers:
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- Filter Pole Position = 2
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- Noise/Pitched Cross-Fade = 4
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- Envelope Rate = 11
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- Gain = 128
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by Perry R. Cook and Gary P. Scavone, 1995 - 2009.
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*/
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/***************************************************/
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class Simple : public Instrmnt
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{
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public:
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//! Class constructor.
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/*!
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An StkError will be thrown if the rawwave path is incorrectly set.
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*/
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Simple( void );
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//! Class destructor.
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~Simple( void );
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//! Clear internal states.
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void clear( void );
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//! Set instrument parameters for a particular frequency.
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void setFrequency( StkFloat frequency );
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//! Start envelope toward "on" target.
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void keyOn( void );
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//! Start envelope toward "off" target.
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void keyOff( void );
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//! Start a note with the given frequency and amplitude.
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void noteOn( StkFloat frequency, StkFloat amplitude );
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//! Stop a note with the given amplitude (speed of decay).
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void noteOff( StkFloat amplitude );
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//! Perform the control change specified by \e number and \e value (0.0 - 128.0).
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void controlChange( int number, StkFloat value );
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//! Compute and return one output sample.
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StkFloat tick( unsigned int channel = 0 );
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protected:
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ADSR adsr_;
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FileLoop *loop_;
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OnePole filter_;
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BiQuad biquad_;
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Noise noise_;
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StkFloat baseFrequency_;
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StkFloat loopGain_;
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};
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inline StkFloat Simple :: tick( unsigned int )
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{
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lastFrame_[0] = loopGain_ * loop_->tick();
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biquad_.tick( noise_.tick() );
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lastFrame_[0] += (1.0 - loopGain_) * biquad_.lastOut();
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lastFrame_[0] = filter_.tick( lastFrame_[0] );
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lastFrame_[0] *= adsr_.tick();
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return lastFrame_[0];
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}
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} // stk namespace
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#endif
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