/* program to display and edit pch analysis file. It has 3 commands.
   1) n frame1 frame2
	will display frame1 to frame2.  If frame2 is 0 it will begin
	current chunk size on frame1.  If frame1 is negative it will
	backup that many frames and display current chunk size from 
	there.  If neither frame1 or frame2 is specified it will
	simply display previous segment again.
   2) p frame1 frame2 mult botcps topcps
	Multiply the pitches of frames frame1 to frame2 by mult if the
	current pitch is >= botcps and <=topcps.  default for botcps
	and top cps are 0 and 999999.  If mult is 0 it will interpolate
	pitches in these frames according to the frequencies of frame
	frame1-1 and frame2+1.  If frame2 is 0 it defaults to frame1.
	Thus p 100 will simply replace the frequency of frame100 by 
	interpolating between frames 99 and 101.
   3) null line (blank space-return)
	this will simply display the next chunk of frames according to
	the currently defined chunk size.
*/
