wip: filter lfo

inc/Adder.h

@@ -13,7 +13,7 @@ struct Adder {
         for (size_t i = 0; i < sample_count; i++) {
             float sample = 0.0f;
             for (Oscillator* osc : oscillators) {
-                sample += osc->GenerateSample(1.f);
+                sample += osc->GenerateSample();
             }
 
             signal[i] = sample;

inc/Oscillator.h

@@ -31,5 +31,5 @@ class Oscillator {
     float GetFreq() { return m_freq; }
     void SetFreq(float freq);
     void Reset();
-    float GenerateSample(float duration);
+    float GenerateSample();
 };

inc/Synth.h

@@ -15,13 +15,14 @@ class Synth {
     std::vector<Oscillator*> m_oscillators;
     std::vector<Effect*> m_effects;
     std::vector<float> m_out_signal;
+    Oscillator* m_lfo;
     void zero_signal();
     void get_note();
     void trigger_note_on_effects();
     void untrigger_note_on_effects();
     void apply_effects();
     void add_oscillator();
-
+    void apply_filter_lfo();
   public:
     Synth(/* args */);
     ~Synth();