# - modernized white noise randomizer

moosic/random-noise.cpp

@@ -1,29 +1,21 @@
 #include "pch.h"
 #include "random-noise.h"
 #include <time.h>
+#include <random>
 
-namespace blooDot::Oscillator
+namespace blooDot::Music 
 {
-	RandomSource::RandomSource(unsigned int randomizerSeed)
-	{
-		this->InitializeRandomizer(randomizerSeed);
-	}
+	extern std::mt19937 gen;
+	extern std::uniform_real_distribution<> noise;
+}
 
-	void RandomSource::InitializeRandomizer(unsigned int randomSeed)
-	{
-		if (randomSeed == 0)
-		{
-			::srand(static_cast<unsigned int>(::time(NULL)));
-		}
-		else
-		{
-			::srand(randomSeed);
-		}
-	}
+namespace blooDot::Oscillator
+{
+	using namespace blooDot::Music;
 
 	double RandomSource::Render(void)
 	{
-		return this->m_lastFrame[0] = static_cast<double>(2. * ::rand() / (RAND_MAX + 1.) - 1.);
+		return this->m_lastFrame[0] = noise(gen);
 	}
 
 	AudioFrame& RandomSource::Render(AudioFrame& frames, unsigned int channel)

moosic/random-noise.h

@@ -7,9 +7,7 @@ namespace blooDot::Oscillator
 	class RandomSource : public FlameSource
 	{
 	public:
-		RandomSource(unsigned int randomizerSeed = 0);
-
-		void InitializeRandomizer(unsigned int randomSeed = 0);
+		RandomSource() {}
 
 		double Render(void);
 		AudioFrame& Render(AudioFrame& frames, unsigned int channel = 0);

moosic/string-shaper.cpp

@@ -155,6 +155,7 @@ namespace blooDot::Oscillator
 		preProcessed = this->m_secondOrder[3].Render(preProcessed);
 		preProcessed = this->m_noiseGate.Render(preProcessed);
 		preProcessed = this->m_delayLineFilter.Render(preProcessed);
+
 		return this->m_lastFrame[0] = preProcessed - this->m_delayLineLinear.Render(preProcessed);
 	}
 

moosic/string-shaper.h

@@ -30,18 +30,18 @@ namespace blooDot::Oscillator
 		AudioFrame& Render(AudioFrame& frames, unsigned int channel = 0);
 
 	private:
-		double				m_baseGain;
-		double				m_loopGain;
-		double				m_mrLen;
-		double				m_mrTension;
-		double				m_pickPosition;
-		double				m_pickExcitation;
-		double				m_mrFreq;
+		double			m_baseGain;
+		double			m_loopGain;
+		double			m_mrLen;
+		double			m_mrTension;
+		double			m_pickPosition;
+		double			m_pickExcitation;
+		double			m_mrFreq;
 
-		RandomSource		m_noiseSource;
-		NoseGate			m_noiseGate;
-		DelayLineFilter		m_delayLineFilter;
+		RandomSource	m_noiseSource;
+		NoseGate		m_noiseGate;
+		DelayLineFilter	m_delayLineFilter;
 		DelayLine		m_delayLineLinear;
-		Derivative			m_secondOrder[4];
+		Derivative		m_secondOrder[4];
 	};
 }

music.cpp

@@ -12,6 +12,7 @@ namespace blooDot::Music
 	std::random_device seed;
 	std::mt19937 gen{ seed() };
 	std::uniform_int_distribution<> dist{ 40, 88 };
+	std::uniform_real_distribution<> noise{ -1., 1. };
 
 	bool StartMusic()
 	{
@@ -51,8 +52,6 @@ namespace blooDot::Music
 			for (size_t i = 0; i < currentFrame.size(); ++i)
 			{
 				const auto frame = oscillator.Render();
-
-				//std::cout << frame;
 
 				currentFrame[i] = static_cast<int>(frame * INT_MAX); //dist(gen);
 			}