Optimize more by avoiding floating point

synth_engine.h

@@ -107,6 +107,7 @@ public:
         float value = 0.0f; // Current output sample
         float next_value = 0.0f; // For double-buffering in processGridStep
         float phase = 0.0f; // For Oscillator, Noise state
+        uint32_t phase_accumulator = 0; // For Oscillators (Fixed point optimization)
     };
 
     static const int GRID_W = 12;
@@ -131,6 +132,7 @@ private:
     uint32_t _increment;  // Phase increment per sample, determines frequency.
     float _volume;
     Waveform _waveform;
+    float _freqToPhaseInc; // Pre-calculated constant for frequency to phase increment conversion
     bool _isGateOpen;
     uint32_t _rngState;
     std::vector<std::pair<int, int>> _processing_order;