JamCracker module structure
---------------------------

By Laurent Clévy (lclevy@club-internet.fr)


offset	type	size	content
-------------------------------------------------
0000	B	4	"BeEp"
0004	W	1	samples number
0006	B	40*num	sample info

	0000	B	31	name
	0031	B	1	flags	(0=sample/3=synth?)
	0032	L	1	size
	0036	L	1	adress	(init sub calculated)

0000	W	1	patterns number
0002	B	6*num	pattern info

	0000	W	1	size
	0002	L	1	adress	(init sub calculated)

0000	W	1	song len

0002	W	1*len	songtable = pattern used

0000	B	8*4*len	1st pattern

	1 pattern = 4 channels

		1 channel = 

		0	B	1	period (note)
		1	B	1	intruments
		2	B	1	play speed (bit7=1:vol=S, bit6=1:porta=S)
		3	B	1	arpegiato info
		4	B	1	vibrato info
		5	B	1	phase shift speed (bits 3-0)
		6	B	1	volume info (bit7=1:D, bit7=0:U)
		7	B	1	portamento info (bit7=1:D, =0:U)

0000	B	1	1st instruments



Example
-------
0000	BeEp
0004	0005
0006	""		03 00000180 00043c50
	""		03 00000180 00043dd0
	"Mc-base"	00 000010b8 00043f50
	"Mc-tom"	00 00001122 00045008
	"Mc-snare"	00 0000112e 0004612a
00ce	000d
00d0	0020 00040a50, 0020 00040e50, 0020 00041250, ...
011e	001f
0120	0000, 0000, 0001, 0001, ...
015e	1st pattern
335e	1st instr