                       * SOUNDTRACK FILE FORMAT *

  iNES is capable of saving soundtrack into so-called .SND files, also
used by my other emulators. You can find tools to work with these files in
the EMUTools package. .SND files have quite simple format described below: 

Byte     Contents
-----------------------------------------------------------------------------
0-3      String "SND^Z"
4        Version number
5        Number of channels
6        Clock frequency, in Hz
7-15     Reserved, must be zeroes!
16-EOF   Sound records of following types:

         a) channel# | frequency.l | frequency.h | volume
            Change sound on a given channel to new frequency (Hz)
            and volume (0..255).

         b) FFh
            A single clock "tick".

         c) FDh | number of ticks
            Multiple clock "ticks" (0..255).

         d) FEh | channel# | sound type
            Change sound type at a given channel. Default type
            is MELODIC for all channels. Currently defined types:

            0 - MELODIC
            1 - WHITE NOISE
            2 - PERIODIC NOISE
-----------------------------------------------------------------------------
