Program sfbandpass | Bandpass filtering. 
[SYNOPSIS]
sfbandpass < in.rsf > out.rsf flo= fhi= phase=n verb=n nplo=6 nphi=6
[COMMENTS]

November 2012 program of the month:
http://ahay.org/blog/2012/11/03/program-of-the-month-sfbandpass/

[PARAMETERS]
float   | fhi | = |   | 	High frequency in band, default is Nyquist 
float   | flo | = |   | 	Low frequency in band, default is 0 
int     | nphi | =6 |   | 	number of poles for high cutoff 
int     | nplo | =6 |   | 	number of poles for low cutoff 
bool    | phase | =n |  [y/n] | 	y: minimum phase, n: zero phase 
bool    | verb | =n |  [y/n] | 	verbosity flag 
[DIRECTORY]
system/generic
