Conversion Notes:

Main Header:
	1 byte - Number of Tracks tc  ---> copy to 02h/03h
	9*tc bytes - Track Header (get copied to RAM)

Track Header:
00	playback_control [ignore]
01	voice_control	[for channel sorting] (80 = DAC, 00-06 = FM)
02	timing_divisor	[set global 04h]
03-04	cur_pos		[channel init pos]
05	tranpose	[--> track header 02h]
06	vol		[--> track header 03h]
07	pan_ams_fms	[--> command E0h]
08	current_voice	[--> command EFh]
