patest_pink.c File Reference

Generate Pink Noise using Gardner method. More...

#include <stdio.h>
#include <math.h>
#include "portaudio.h"

Data Structures
struct	PinkNoise
struct	paTestData
Defines
#define	PINK_MAX_RANDOM_ROWS   (30)
#define	PINK_RANDOM_BITS   (24)
#define	PINK_RANDOM_SHIFT   ((sizeof(long)*8)-PINK_RANDOM_BITS)
#define	PINK_MEASURE
#define	PINK_TEST
Functions
void	InitializePinkNoise (PinkNoise *pink, int numRows)
float	GeneratePinkNoise (PinkNoise *pink)
int	main (void)
Variables
float	pinkMax = -999.0
float	pinkMin = 999.0

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Detailed Description

Generate Pink Noise using Gardner method.

Optimization suggested by James McCartney uses a tree to select which random value to replace.

	x x x x x x x x x x x x x x x x 
	x   x   x   x   x   x   x   x   
	x       x       x       x       
	 x               x               
	   x   

Tree is generated by counting trailing zeros in an increasing index. When the index is zero, no random number is selected.

Author:

Phil Burk http://www.softsynth.com

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Define Documentation

#define PINK_MAX_RANDOM_ROWS   (30)

#define PINK_MEASURE

#define PINK_RANDOM_BITS   (24)

#define PINK_RANDOM_SHIFT   ((sizeof(long)*8)-PINK_RANDOM_BITS)

#define PINK_TEST

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Function Documentation

float GeneratePinkNoise

(

PinkNoise *

pink

)

void InitializePinkNoise	(	PinkNoise *	pink,
		int	numRows
	)

int main

(

void

)

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Variable Documentation

float pinkMax = -999.0

float pinkMin = 999.0

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