The MTM format is generated by the Multi Track Module tracker by the demo group
Renaissance. The tracker features up to 32 channel digital music. Instead of
saving whole patterns, the tracker only saves the different tracks and the data
which tracks should be played together at which time, thus saving some pattern
space.
OFFSET Count TYPE Description
0000h 3 char ID='MTM'
0003h 1 byte Version data
upper nibble is major version number
lower nibble is minor version number
0004h 20 char ASCIIZ song name
0018h 1 word Number of saved tracks.
="NOT"
001Ah 1 byte Highest pattern number saved
="NOP"
001Bh 1 byte Last order number to play(=Songlength-1)
001Ch 1 word Length of extra comment field in bytes
="XSZ"
001Eh 1 byte Number of samples
="NOS"
001Fh 1 byte Attribute byte (currently defined as 0)
0020h 1 byte Beats per track
0021h 1 byte Number of tracks
0022h 32 byte Pan positions of the voices
(0=left, 15=right??)
0042h "NOS" rec Instrument data
22 char Sample name
1 dword Sample length in bytes
1 dword Start of sample loop in bytes
1 dword End of sample loop in bytes
1 byte Fine tune value for sample
1 byte Default volume for sample
1 byte Attribute byte, bit mapped
0 0=8 bit sample,1=16 bit sample
1-7 undefined (set to zero)
0042h+ 128 byte Pattern order data
"NOS"*37
01C2h+
"NOS"*37 "NOT" rec Track data
Each track is saved independently and has
the size of exactly 192 bytes. Each track
is arranged as 64 3-byte notes with the
following format :
64*3 byte BYTE 0 BYTE 1 BYTE 2
ppppppii iiiieeee aaaaaaaa
p = pitch value (0=no pitch stated)
i = instrument number (0=no instrument number)
e = effect number
a = effect argument
The effects are the standard Protracker
effects.
01C2h+ ("NOP"+1)*32 word Track sequencing data
"NOS"*37+ This is the list of which track is used
"NOT"*192 as which voice in each pattern. One track
can be part of many patterns, the drums
for example.
Track 0 is never saved but is always
considered as an empty track. That means
that counting really starts at one.
The data is organized in sets of 32 voices.
The first word contains the information which
track is used in pattern 0, voice 0. The next
word is for pattern 0, voice 1, etc., this
is repeated for each pattern, 32 words for each
saved pattern.
01C2h+ "XSZ" char Extra comment field. This contains some
"NOS"*37+ message or something.
"NOT"*192+
("NOP"+1)*32*2
01C2h+ ? byte Raw sample data(unsigned).
"NOS"*37+
"NOT"*192+
("NOP"+1)*32*2+
"XSZ"
EXTENSION:MTM
SEE ALSO:MOD
OCCURENCES:PC
PROGRAMS:MMEDIT,DMP
VALIDATION:
This information is from Corion.net and is used with permission.