bytemedia

instruments.h (528B)

#ifndef _XOPEN_SOURCE
#warning Should #define _XOPEN_SOURCE 700
#define _XOPEN_SOURCE 700
#endif
#include <math.h> // sinf(), M_PI
float
pure_sin(struct au_header *header, int hertz, int t)
{
	float w1 = 2*M_PI*hertz/header->samplerate;
	return sinf(w1*t);
}
float
clarinet(struct au_header *header, int hertz, int t)
{
	float w1 = 2*M_PI*hertz/header->samplerate;
	float tune = sin(w1*t) + 0.75*sin(3*w1*t) + 0.5*sin(5*w1*t) + 0.14*sin(7*w1*t) + 0.5*sin(9*w1*t) + 0.12*sin(11*w1*t) + 0.17*sin(13*w1*t);
	return tune/10;
}