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81 lines
2.1 KiB
81 lines
2.1 KiB
#include "../utility/dsp.h"
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#include "vosim.h"
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#include <math.h>
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using namespace daisysp;
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void VosimOscillator::Init(float sample_rate)
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{
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sample_rate_ = sample_rate;
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carrier_phase_ = 0.0f;
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formant_1_phase_ = 0.0f;
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formant_2_phase_ = 0.0f;
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SetFreq(105.f);
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SetForm1Freq(1390.f);
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SetForm2Freq(817.f);
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SetShape(.5f);
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}
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float VosimOscillator::Process()
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{
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carrier_phase_ += carrier_frequency_;
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if(carrier_phase_ >= 1.0f)
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{
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carrier_phase_ -= 1.0f;
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float reset_time = carrier_phase_ / carrier_frequency_;
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formant_1_phase_ = reset_time * formant_1_frequency_;
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formant_2_phase_ = reset_time * formant_2_frequency_;
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}
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else
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{
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formant_1_phase_ += formant_1_frequency_;
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if(formant_1_phase_ >= 1.0f)
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{
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formant_1_phase_ -= 1.0f;
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}
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formant_2_phase_ += formant_2_frequency_;
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if(formant_2_phase_ >= 1.0f)
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{
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formant_2_phase_ -= 1.0f;
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}
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}
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float carrier = Sine(carrier_phase_ * 0.5f + 0.25f) + 1.0f;
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float reset_phase = 0.75f - 0.25f * carrier_shape_;
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float reset_amplitude = Sine(reset_phase);
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float formant_0 = Sine(formant_1_phase_ + reset_phase) - reset_amplitude;
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float formant_1 = Sine(formant_2_phase_ + reset_phase) - reset_amplitude;
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return carrier * (formant_0 + formant_1) * 0.25f + reset_amplitude;
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}
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void VosimOscillator::SetFreq(float freq)
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{
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carrier_frequency_ = freq / sample_rate_;
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carrier_frequency_ = carrier_frequency_ > .25f ? .25f : carrier_frequency_;
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}
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void VosimOscillator::SetForm1Freq(float freq)
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{
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formant_1_frequency_ = freq / sample_rate_;
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formant_1_frequency_
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= formant_1_frequency_ > .25f ? .25f : formant_1_frequency_;
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}
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void VosimOscillator::SetForm2Freq(float freq)
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{
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formant_2_frequency_ = freq / sample_rate_;
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formant_2_frequency_
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= formant_2_frequency_ > .25f ? .25f : formant_2_frequency_;
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}
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void VosimOscillator::SetShape(float shape)
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{
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carrier_shape_ = shape;
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}
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float VosimOscillator::Sine(float phase)
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{
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return sinf(TWOPI_F * phase);
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} |