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Format
name : Channel Player v2
Created by : Alan / Impact (1994)
Sources :
* One exemple file sent by Gryzor (thx)
Note : almost the same as v1 ...
. The size the pattern list is *8 here and the pattern list is composed
of the addresses of the tracks, not the numbers. Also, there's the packing
of the tracks (2 or 3 bytes for one note)
|
OFFSET
|
SIZE (bytes)
|
COMMENT
|
|
0
2
-
4
6
|
2
2
-
2
4
|
- Number of sample (+$A)
- Size of the pattern table
(number of pattern to play *8)
- ?!?
- ?!?
|
The following is repeated NOS times
with 16 bytes description for one sample
|
Ah
Eh
10h
11h
12h
16h
18h
|
4
2
1
1
4
2
2
|
- Sample Start address (memory)
- Sample size / 2
- ?!?
- Volume
- Loop Start address
- Loop size / 2
- Finetune (*$48) |
|
?!?
-
?!?
-
|
?!?
-
?!?
-
|
- Pattern table. composed of 4 track
numbers (byte)
- Pattern data. Each track is saved one
after another. |
we get something like that:
pattern 0 :
all the 64 row of voice 0
all the 64 row of voice 1
all the 64 row of voice 2
all the 64 row of voice 3
pattern 1 : ...
The size of each pattern is variable and
can be up to 300h bytes. One note can be 2 or 3 bytes long.
The first bit of the first byte is a description
bit.
* Case 1:
-relative note number
/ /
| |
1000 0000 0000 0000
| | | | |
| \ / \ \
| sample effect
| number
\
-if this bit is set, there's only a pitch,
a sample nbr and a Fx (no FxArg)
|
* Case 2:
Sample number
| /\
| | |
0000 0000 0000 0000 0000 0000
|| | | | | |
-| \ / \/ \ /
| relative effect effect
| note (!$7) value
| number
|------------description bit set to 0
|
The relative note number is *2, and therefore,
the bit 0 of the first byte NEVER will be set to 1. It is, then, used
by the sample number (from 0 to $1F). Just dont forget to 'OR' the
relative note number with $FE :)
Beware of the effects numbers 5,6,A (the
ones with a volume slide) because the effect parameter is a SIGNED
value !
relative note number: (Protracker)
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 : (CHN2)
C-1 to B-1 : 02,04,06,08,0a,0c,0e,10,12,14,16,18
C-2 to B-2 : 1a,1c,1e,20,22,24,26,28,2a,2c,2e,30
C-3 to B-3 : 32,34,36,38,3a,3c,3e,40,42,44,46,48
|
Follow Sample datas stored like Protracker.
Nothing is packed..
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