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81 lines
2.1 KiB
C++
81 lines
2.1 KiB
C++
/***************************************************/
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/*! \class FMVoices
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\brief STK singing FM synthesis instrument.
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This class implements 3 carriers and a common
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modulator, also referred to as algorithm 6 of
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the TX81Z.
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\code
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Algorithm 6 is :
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/->1 -\
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4-|-->2 - +-> Out
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\->3 -/
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\endcode
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Control Change Numbers:
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- Vowel = 2
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- Spectral Tilt = 4
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- LFO Speed = 11
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- LFO Depth = 1
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- ADSR 2 & 4 Target = 128
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The basic Chowning/Stanford FM patent expired
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in 1995, but there exist follow-on patents,
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mostly assigned to Yamaha. If you are of the
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type who should worry about this (making
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money) worry away.
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by Perry R. Cook and Gary P. Scavone, 1995 - 2004.
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*/
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/***************************************************/
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#ifndef STK_FMVOICES_H
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#define STK_FMVOICES_H
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#include "FM.h"
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class FMVoices : public FM
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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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FMVoices();
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//! Class destructor.
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~FMVoices();
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//! Set instrument parameters for a particular frequency.
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virtual void setFrequency(StkFloat frequency);
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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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//! Compute one output sample.
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StkFloat tick();
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//! Computer \e vectorSize outputs and return them in \e vector.
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StkFloat *tick(StkFloat *vector, unsigned int vectorSize);
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//! Fill a channel of the StkFrames object with computed outputs.
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/*!
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The \c channel argument should be one or greater (the first
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channel is specified by 1). An StkError will be thrown if the \c
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channel argument is zero or it is greater than the number of
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channels in the StkFrames object.
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*/
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StkFrames& tick( StkFrames& frames, unsigned int channel = 1 );
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//! Perform the control change specified by \e number and \e value (0.0 - 128.0).
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virtual void controlChange(int number, StkFloat value);
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protected:
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int currentVowel_;
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StkFloat tilt_[3];
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StkFloat mods_[3];
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};
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#endif
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