add wavefolder

clip/wavefolder.h

@@ -0,0 +1,38 @@
+#pragma once
+
+namespace trnr {
+class wavefolder {
+public:
+	float amount = 1.f;
+
+	float process_sample(float& _sample)
+	{
+		if (amount > 1.f) { return fold(_sample * amount); }
+
+        return 0.f;
+	}
+
+private:
+	float fold(float _sample)
+	{
+		// fold positive values
+		if (_sample > 1.0) {
+			_sample = 2.0 - _sample;
+
+			if (_sample < 0.0) { _sample = -_sample; }
+
+			return fold(_sample);
+		}
+		// fold negative values
+		else if (_sample < -1.0) {
+			_sample = -2.0 - _sample;
+
+			if (_sample > 0.0) { _sample = -_sample; }
+
+			return fold(_sample);
+		} else {
+			return _sample;
+		}
+	}
+};
+}; // namespace trnr

synth/tx_operator.h

@@ -1,6 +1,7 @@
 #pragma once
 #include "tx_envelope.h"
 #include "tx_sineosc.h"
+#include "../clip/wavefolder.h"
 
 namespace trnr {
 class tx_operator {
@@ -13,18 +14,19 @@ public:
 
 	tx_envelope envelope;
 	tx_sineosc oscillator;
+	wavefolder wavefolding;
 	float ratio;
 	float amplitude;
 
 	float process_sample(const bool& gate, const bool& trigger, const float& frequency, const float& velocity,
 						 const float& pm = 0)
 	{
-
 		float env = envelope.process_sample(gate, trigger);
 
 		// drifts and sounds better!
 		if (envelope.is_busy()) {
-			double osc = oscillator.process_sample(trigger, frequency, pm);
+			float osc = oscillator.process_sample(trigger, frequency, pm);
+			osc = wavefolding.process_sample(osc);
 			return osc * env * velocity;
 		} else {
 			return 0.;