// Minimize bp.den
#include <stdio.h>
#include <stdlib.h>
#include "h.h"
BP bp; note * mus = 0;
int main(int argc, char * * argv){
if(argc < 2) {printf("include filename.\n"); exit(0);}
note* music = Read(argv[1], &bp); int gran = bp.den;
{void fed(note n){if(n.dur<maxdur) gran = gcd(gran, n.dur);}
scan(fed, music, 0);}
printf("Density was %d units per quater note.\n", bp.den);
int scl = bp.den/gran; bp.den /= scl; 
printf("New density is %d.\n", bp.den);
{void fed(note n){
  n.start /= scl; if(n.dur<maxdur) n.dur /= scl; aug(n, &mus);}
 scan(fed, music, 1);}
Write("out.midi", mus, &bp); return 0;}