SKYT packer format
Created by Mr. Bluesky / Drifters (NoiseConverter tells it's SKYT/Drifters)
Analysed by Asle / ReDoX (asle@mygale.org)

Source :
 - two SKYT packed files sent by Gryzor (thx !)


Offset    size (byte)    Comment
------    -----------    -------

      **************************************
      * the following is repeated 31 times *
      * with 8 bytes description for 1 smp *
*********************************************************
                                                        *
 0             2         Sample Size / 2                *
 2             1         Finetune (0 -> F)              *
 3             1         Volume (0 - 40h)               *
 4             2         Loop Start / 2                 *
 6             2         Loop Size / 2                  *
                         if there's no loop, this value *
                         is $0000 (not $0001 as ptk !)  *
                                                        *
*********************************************************

248            8         ?!? (empty bytes). It could be for a 32nd
(F8h)                    sample or just to wait $100 address :).

256            4         ID "SKYT"
(100h)

260            1         Size of pattern table (-1)
(104h)

261            ?         Pattern table.
(105h)                   What's really stored is the number of
                         each track.

 dump exemple:

0100: 53 4B 59 54 13 00 0B 00  - 0C 00 0D 00 0E 00 0B 00   SKYT............
0110: 0F 00 10 00 11 00 12 00  - 13 00 14 00 15 00 0B 00   ................

 - pattern table size is 20 ($13+1)
 - first pattern tracks are $000b,$000c,$000d and $000e


?              1         ?!? ($00h)

?              ?         track datas. Each track is 256 bytes long
                         (64 rows * 4 bytes).


 So, each note takes 4 bytes and is stored that way :


   -Relative note Nbr    -Unused
  /     \               /  /
 |       |             |  |
 0000 0000  0000 0000  0000 0000  0000 0000  
            | ||    |       |  |  |       |
           / /  \  /         \/    \     /
          / /  Sample      effect   effect
  Unused----   number             parameter


relative note number (PTK):

C-1 to B-1 : 856,808,762,720,678,640,604,570,538,508,480,453
C-2 to B-2 : 428,404,381,360,339,320,302,285,269,254,240,226
C-3 to B-3 : 214,202,190,180,170,160,151,143,135,127,120,113

becomes (SKYT):

C-1 to B-1 : 01,02,03,04,05,06,07,08,09,0a,0b,0c
C-2 to B-2 : 0d,0e,0f,10,11,12,13,14,15,16,17,18
C-3 to B-3 : 19,1a,1b,1c,1d,1e,1f,20,21,22,23,24


 Follows Sample datas stored like ProTracker.
Nothing is packed..