Program sfzerocross | Zero crossings. 
[SYNOPSIS]
sfzerocross < in.rsf > out.rsf levels=3
[PARAMETERS]
int     | levels | =3 |   | 	levels of quantization [2,3,5].
      levels=2	1: zero crossing or zero; 0: otherwise
      levels=3	1: positive to negative zc; -1 negative to positive zc; 0: otherwise
      levels=5	+/-2: positive/negative values; +/-1: as in levels=3; 0: zero. 
    
[DIRECTORY]
user/saragiotis
