MIXVIEWS:
   (1) There is NO UNDO command in mixviews. Before making significant changes within
       a "view" window that contains important data, or data that would be difficult
       or tedious to re-create, save the data in this window to a file, or else copy
       it to a new window (using the "copy to new" command under the "edit" menu.
   (2) LPC analysis: "mixviews" often will abort when it encounters a silence -- even a
       very brief silence -- within a soundfile undergoing lpc analysis.
       The best current workaround for this problem is to mix in some subaudio,
       low amplitude noise during the silence so that "mixviews" has SOMETHING
       (here an inaudible audio signal) to analyze. The sflib directory anal/lpc
       includes a soundfile  called "subaudio" noise that can be used for this
       purpose. The  duration of this inaudible soundfile is 10 seconds.
       If you will be doing LPC analyses with "mixviews," it is a good idea to
       open and then minimize a window for the "subaudionoise" soundfile. If, while
       performing an LPC analysis, "mixviews" aborts with the error message
             Can't analyze frame with 0 amplitude
       open the "subaudionoise" window, select an insert point in the soundfile
       being analyzed where a silence begins, select a region of the "subaudionoise"
       soundfile, select "copy" under edit, then, in the soundfile being analyzed,
       make certain your insert point is correct and select "mix" under the "edit"
       menu. The subaudionoise signal from the "clipboard" buffer will be mixed into
       the source sundfile, and this will give "mixviews" a signal to analyze during
       the silence. Obviously, it is best to do this on a COPY of the soundfile
       being analyzed rather than on the original.

-------------------------
LPANAL : our SGI version of lpanal cannot deal with pitch analysis on
  44.1k soundfiles. The -P (lowest estimated itch) argument must be set to 0, and
  pitch analysis skipped, for all 44.1 k soundfiles. This makes lpanal useless
   for analyzing msot 44.1 k sounds, although crotales and certain other aperiodic
   percussive sounds can be analyzed. The pitch analysis works fine with 22k soundfiles.
   For this reason, "lpanal" program is NOT RECOMMENDED for doing lpc analyses. Use
   "mixviews" instead.
