From: holmes@mrx.webo.dg.com (Chris Holmes)

Subject: Adlib .ROL file format

Date: Wed, 26 Aug 92 12:04:43 GMT



I requested this a while back and got a couple of requests for a summary,

so here goes:



Files containing note information (i.e. songs) are suffixed with ".ROL".

("File version" and "editing scale" are non-musical information used by Visual

Composer (TM).)



Structure of .ROL files:

__________________________________________________________________



fld #   size   type     description

        (bytes)



1       2       int     file version, major

2       2       int     file version, minor

3       40      char    unused

4       2       int     ticks per beat

5       2       int     beats per measure

6       2       int     editing scale (Y axis)

7       2       int     editing scale (X axis)

8       1       char    unused

9       1       char    0 = percussive mode

                        1 = melodic mode

10      90      char    unused

11      38      char    filler

12      15      char    filler

13      4       float   basic tempo



Field 14 indicates the number of times to repeat fields 15 and 16:



14      2       int     number of tempo events

15      2       int     time of events, in ticks

16      4       float   tempo multiplier (0.01 - 10.0)



The remaining fields (17 to 34) are to be repeated for each of 11 voices:



17      15      char    filler

18      2       int     time (in ticks) of last note +1



Repeat the next two fields (19 and 20) while the summation of field 20 is

less than the value of field 18:



19      2       int     note number: 0 => silence

                        from 12 to 107 => normal note (you must

                        subtract 60 to obtain the correct value

                        for the sound driver)

20      2       int     note duration, in ticks

21      15      char    filler



Field 22 indicates the number of times to repeat fields 23 to 26:



22      2       int     number of instrument events

23      2       int     time of events, in ticks

24      9       char    instrument name

25      1       char    filler

26      2       int     unused

27      15      char    filler



Field 28 indicates the number of times to repeat fields 29 and 30:



28      2       int     number of volume events

29      2       int     time of events, in ticks

30      4       float   volume multiplier (0.0 - 1.0)

31      15      char    filler



Field 32 indicates the number of times to repeat fields 33 and 34:



32      2       int     number of pitch events

33      2       int     time of events, in ticks

34      4       float   pitch variation (0.0 - 2.0, nominal is 1.0)



Notes

_____



Fields #1 and #2 should be set to 0 and 4 respectively. Field #10 should

be filled with zeros.

