74 lines
1.4 KiB
C++
74 lines
1.4 KiB
C++
/*
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Copyright (c) 2020 Electrosmith, Corp
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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#pragma once
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#ifndef DSY_FM2_H
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#define DSY_FM2_H
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#include <stdint.h>
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#include "Synthesis/oscillator.h"
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#ifdef __cplusplus
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namespace daisysp
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{
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/** Simple 2 operator FM synth voice.
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Date: November, 2020
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Author: Ben Sergentanis
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*/
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class Fm2
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{
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public:
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Fm2() {}
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~Fm2() {}
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/** Initializes the FM2 module.
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\param samplerate - The sample rate of the audio engine being run.
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*/
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void Init(float samplerate);
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/** Returns the next sample
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*/
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float Process();
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/** Carrier freq. setter
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\param freq Carrier frequency in Hz
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*/
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void SetFrequency(float freq);
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/** Set modulator freq. relative to carrier
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\param ratio New modulator freq = carrier freq. * ratio
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*/
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void SetRatio(float ratio);
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/** Index setter
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\param FM depth, 5 = 2PI rads
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*/
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void SetIndex(float index);
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/** Returns the current FM index. */
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float GetIndex();
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/** Resets both oscillators */
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void Reset();
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private:
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static constexpr float kIdxScalar = 0.2f;
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static constexpr float kIdxScalarRecip = 1.f / kIdxScalar;
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Oscillator mod_, car_;
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float idx_;
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float freq_, lfreq_, ratio_, lratio_;
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};
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} // namespace daisysp
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#endif
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#endif
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