scaffold new classes

src/synth/Voice.hpp

@@ -0,0 +1,36 @@
+
+#pragma once
+
+#include <stdint.h>
+
+#include "Instrument.hpp"
+
+// a voice is a tone generator that the synth uses for polyphony
+// the synth mixes multiple voices together into a polyphonic audio. calculations for samples are handled in the instrument
+class Voice {
+
+public:
+
+    Voice() = default;
+    ~Voice() = default;
+
+    void noteOn(int8_t midiNote, float velocity);
+    void noteOff();
+    bool isActive();
+
+    float process(bool& scopeTrigger);
+    uint8_t note() { return note_; }
+
+private:
+
+    float sampleRate_ = 44100.0f;
+
+    inline float noteToFrequency(uint8_t note);
+    
+    uint8_t note_ = 0;
+    float velocity_ = 1.0f;
+    bool active_ = false;
+
+    Instrument* instrument;
+
+};