#include<stdio.h>
#include<stdlib.h>
#include<math.h>

#define r 48000

//Set output length (in seconds) here!
#define time_seconds 30

int main(){
  double t;
  double out;
  double a[r]={0};

  FILE *f = fopen("bb.raw","wb");

  while(t<(r*time_seconds)){
    out=sin(t/(25-floor(fmod(t/12000,16))))/3+a[(int)fmod(t,r)];
    a[(int)fmod(t,r)]=out/1.4;
    fwrite(&out,sizeof(double),1,f);
    t++;
  }
  fclose(f);
  return 0;
}