add oscillator

src/synth/Instruments/WavetableOscillator.hpp

@@ -0,0 +1,29 @@
+
+#pragma once
+
+#include <cmath>
+
+#include "synth/instruments/Instrument.hpp"
+
+class PianoString : public Instrument {
+
+public:
+
+    WavetableOscillator() = default;
+    WavetableOscillator(ConfigService* config, LoggerService* logger, float sampleRate);
+    ~WavetableOscillator() = default;
+    
+    void noteOn(float frequency, float velocity) override;
+    void noteOff() override;
+
+    bool isActive() override;
+
+    float process(bool& scopeTrigger) override;
+
+private:
+
+    bool loadWavetable(std::string filename); // TODO: load from conf file instead
+
+    std::vector<float> wavetable;
+
+};

src/synth/WavetableLoader.hpp

@@ -0,0 +1,4 @@
+
+// placeholder to handle loading wavetables from files
+// so that wavetables can be shared to each voice/instrument
+// only need to need to load once for x number of voices