Alesis HR-16 Service Manual page 34

22H TOM 3 sound number (0-30H)
23H TOM 3 output assign (bit 7) and volume (bits 0-6: 0-63H)
24H TOM 3 panning (bits 5-7: 0=L, 6=R) & pitch (bits 0-4:0=-16, 1FH=+15)
25H TOM 4 sound number (0-30H)
26H TOM 4 output assign (bit 7) and volume (bits 0-6: 0-63H)
27H TOM 4 panning (bits 5-7: 0=L, 6=R) & pitch (bits 0-4:0=-16, 1FH=+15)
28H RIDE sound number (0-30H)
29H RIDE output assign (bit 7) and volume (bits 0-6: 0-63H)
2AH RIDE panning (bits 5-7: 0=L, 6=R) & pitch (bits 0-4:0=-16, 1FH=+15)
2BH CRASH sound number (0-30H)
2CH CRASH output assign (bit 7) and volume (bits 0-6: 0-63H)
2DH CRASH panning (bits 5-7: 0=L, 6=R) & pitch (bits 0-4:0=-16, 1FH=+15)
2EH PERC 1 sound number (0-30H)
2FH PERC 1 output assign (bit 7) and volume (bits 0-6: 0-63H)
30H PERC 1 panning (bits 5-7: 0=L, 6=R) & pitch (bits 0-4:0=-16, 1FH=+15)
31H PERC 2 sound number (0-30H)
32H PERC 2 output assign (bit 7) and volume (bits 0-6: 0-63H)
33H PERC 2 panning (bits 5-7: 0=L, 6=R) & pitch (bits 0-4:0=-16, 1FH=+15)
34H-?? PATTERN DATA
?? 0FFH (End of pattern)
Pattern data must follow these rules:
1) Each byte of the pattern data (from 34H on) is either a drum event, or a count of clocks to wait, or
0FFH, which indicates the end of the pattern. If the event is a drum event, bit 7 will be 0, bits 4-6 will
contain the dynamics of the note (0-7), and bits 0-3 will contain the drum to be played (0-15, in the
same order as above). If the event is a count of clocks, bit 7 will be high, and bits 0-6 will indicate the
number of clocks to wait (0-126). A wait of 0 clocks is legal, and will cause the pointer to
immediately advance to the next event. An empty 8 beat pattern would consist of the following
pattern data: 0FEH, 0FEH, 0FEH, 0FEH, 0FEH, 0FEH, 08CH, 0FFH. This data will count clocks for
126*6+12 clocks (768 clocks, divided by 96 clocks per beat = 8 beats), after which it will loop around
since it has reached the end of the pattern.
2) Adding the number of bytes in a pattern to the absolute pointer of a pattern should point to 1 byte past
the last byte of the pattern.
SONG DATA FORMAT
The following is the format of each song, starting with the address pointed to by the absolute pointer to the
pattern (offset by 8200H):
00H LSB of number of bytes in song, including header.
01H MSB of number of bytes in song, including header.
02H Step 1
03H Step 2
04H Step 3
05H Step 4
06H etc....
xxH Pattern number 0FFH (end of song)
Song data must follow these rules:
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