Small optmization to SLN, Progress uses standard sampletime fields

src/Progress.cpp

@@ -43,16 +43,8 @@ struct Progress : AHModule {
 		NUM_LIGHTS
 	};
 
-	float sampleRate;
-
-	Progress() : AHModule(NUM_PARAMS, NUM_INPUTS, NUM_OUTPUTS, NUM_LIGHTS) {
-		sampleRate = engineGetSampleRate();
-	}
+	Progress() : AHModule(NUM_PARAMS, NUM_INPUTS, NUM_OUTPUTS, NUM_LIGHTS) { }
 
-	void onSampleRateChange() override { 
-		sampleRate = engineGetSampleRate();
-	}
-
 	void step() override;
 
 	enum ParamType {
@@ -228,7 +220,7 @@ void Progress::step() {
 		else {
 			// Internal clock
 			float clockTime = powf(2.0f, params[CLOCK_PARAM].value + inputs[CLOCK_INPUT].value);
-			phase += clockTime * engineGetSampleTime();
+			phase += clockTime * delta;
 			if (phase >= 1.0f) {
 				setIndex(index + 1, numSteps);
 			}

src/SLN.cpp

@@ -44,6 +44,16 @@ struct SLN : AHModule {
 	float target = 0.0f;
 	float current = 0.0f;
 
+	// minimum and maximum slopes in volts per second
+	const float slewMin = 0.1;
+	const float slewMax = 10000.0;
+
+	const float slewRatio = slewMin / slewMax;
+
+	// Amount of extra slew per voltage difference
+	const float shapeScale = 1.0/10.0;
+
+
 };
 
 void SLN::step() {
@@ -73,26 +83,19 @@ void SLN::step() {
 	} 
 
 	float shape = params[SLOPE_PARAM].value;
-
-	// minimum and maximum slopes in volts per second
-	const float slewMin = 0.1;
-	const float slewMax = 10000.0;
-
-	// Amount of extra slew per voltage difference
-	const float shapeScale = 1.0/10.0;
-
 	float speed = params[SPEED_PARAM].value;
-	float slew = slewMax * powf(slewMin / slewMax, speed);
+
+	float slew = slewMax * powf(slewRatio, speed);
 
 	// Rise
 	if (target > current) {
-		current += slew * crossfade(1.0f, shapeScale * (target - current), shape) * engineGetSampleTime();
+		current += slew * crossfade(1.0f, shapeScale * (target - current), shape) * delta;
 		if (current > target) // Trap overshoot
 			current = target;
 	}
 	// Fall
 	else if (target < current) {
-		current -= slew * crossfade(1.0f, shapeScale * (current - target), shape) * engineGetSampleTime();
+		current -= slew * crossfade(1.0f, shapeScale * (current - target), shape) * delta;
 		if (current < target) // Trap overshoot
 			current = target;
 	}

src/UI.hpp

@@ -18,13 +18,16 @@ struct ParamEvent {
 struct AHModule : Module {
 
 	float delta;
+	float rho;
 
 	AHModule(int numParams, int numInputs, int numOutputs, int numLights = 0) : Module(numParams, numInputs, numOutputs, numLights) {
-		delta = 1.0 / engineGetSampleRate();
+		delta = engineGetSampleTime();
+		rho = engineGetSampleRate();
 	}
 
 	void onSampleRateChange() override { 
-		delta = 1.0 / engineGetSampleRate();
+		delta = engineGetSampleTime();
+		rho = engineGetSampleRate();
 	}
 
 	int stepX = 0;