ProRunner v1 format
Created by Cosmos / Sanity (1992)
Analysed by Asle / ReDoX (asle@mygale.org)

Source:
 - Converted MODs with NoiseConverter
 - 3 PRUN1 files sent by Gryzor (Thx !).


Offset    size (byte)    Comment
------    -----------    -------
  0           14h        Title

      ***************************************
      * the following is repeated 31 times  *
      * with 30 bytes description for 1 smp *
******************************************************
                                                     *
 14h          16h        Sample Name                 *
 2Ah           2         Sample Size / 2             *
 2Ch           1         Finetune (0 -> F)           *
 2Dh           1         Volume (0 - 40h)            *
 2Eh           2         Loop Start / 2              *
 30h           2         Loop Size / 2               *
                                                     *
******************************************************

3B6h           1         Number of pattern to play
3B7h           1         7Fh (set that way for some
                         OLD NoiseTracker replayers )
3B8h         80h         pattern table

438h           4         "SNT."  ID string
43Ch           ?         Pattern datas.

 each pattern takes 400h bytes
 row 00 | channel 1 | channel 2 | channel 3 | channel 4 |
 row 01 | channel 1 | channel 2 | channel 3 | channel 4 |
  ...
 row 63 | channel 1 | channel 2 | channel 3 | channel 4 |

 each channel is coded that way :

 0000 0000  0000 0000  0000 0000  0000 0000
 \       /  \       /   |   \  /  \       /
  sample     relative   |  effect  effect
  number     note     unused       value
  0 -> 1f    number


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 (PRUN1):

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..