DWORD	NUMBER OF PCM CHANNELS
DWORD	NUMBER OF PCM SAMPLES
DWORD	VRC6 USED (BOOLEAN)
BYTE*11	CHANNEL MAP

for X samples:

DWORD	LENGTH
DWORD	LOOP LENGTH
BYTE	BIDI LOOP
BYTE*X	(DATA)

SEQUENCER DATA:

DWORD	number of frames
DWORD	number of channels (11)

for each FRAME:

--------------------------------------------------
for each CHANNEL:
DWORD	FREQUENCY
BYTE	NEWNOTE (BOOLEAN)
BYTE	TIMBRE
BYTE	VOLUME
BYTE	SAMPLE OFFSET (ONLY USED FOR PCM CHANNELS) (STILL EXPORTED FOR OTHER CHANNELS)
--------------------------------------------------

DWORD	DURATION (MICROSECONDS) OF FRAME

________________________________________________________

channel map entries:

0=UNMAPPED
1=PULSE1
2=PULSE2
3=TRI
4=NOISE
5=VRC6 PULSE1
6=VRC6 PULSE2
7=VRC6 SAWTOOTH
8=PCM1
9=PCM2
10=PCM3
11=PCM4