Partially decoded sysex codes and working notes

Synth Settings (Per Mattsson)

Synth Settings (Elby):

Here's a sample sysex stream (34 bytes), with byte numbering beneath it:

F0 33 7C 06 41 01 60 1F 76 0C 0C 01 40 26 5B 6C 47 2B 31 42 72 00 01 63 30 40 6C 12 1B 05 06 60 51 F7
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

Coding: The bytes are shown as 8 bits, with A indicating a position is assigned to that field, x indicating the position is filled by another field, and ? indicating the use of that bit has not yet been determined.

    Byte 1 - Sysex start
    Byte 2 - Nord's manufacturer id
    Byte 3 - ???? ????
    Byte 4 - Nord's product id ?
    Byte 5-6 - ???? ????

Internal/external clock flag (0 = external, 1 = internal)

Byte 7: ??A? ???x

40 = external clock
60 = internal clock

Min MIDI velocity scale (values 0 - 127)

Byte 7, 8: ??x? ???A AAAx xxxx

0 = 60 1F
1 = 60 3F
2 = 60 5F
3 = 60 7F
4 = 61 1F
...
63 = 6F 7F
64 = 70 1F
...
127 = 7F 7F

LEDs active flag (0=inactive, 1=active)

Byte 8: xxxA xxxx

0F = inactive
1F = active

Max MIDI velocity scale (0-127)

Byte 8, 9: xxxx AAAA ?AAA xxxx

0 = 10 06
1 = 10 16
2 = 10 26
3 = 10 36
4 = 10 46
5 = 10 56
6 = 10 66
7 = 10 76
8 = 11 06
...
127 = 1F 76

Tempo (0-255, interface only transmits 31-239)

Byte 9, 10: xxxx AAAA ?AAA Axxx

     byte code      tempo
    ----------      -------
     71 7C              31
     72 04               32
     72 0C              33
     72 14               34
              ...
     72 74               46
     72 7C              47
     73 04               48
            ...
     7E 7C            239

10 - Local off (0=off, 1=on)

Byte 10: ?xxx xAxx

off = 00
on = 04

10 - Keyboard mode (0=active, 1=inactive)

Byte 10: ?xxx xxAx

active = 04
selected = 06

10 - Pedal polarity (0=normal, 1=inverted)

Byte 10: ?xxx xxxA

normal = 00
inverted = 01

11 - Global sync (1-32, offset of 1 -> 00=1 )

Byte 11: ?AAA AAxx

00 = 1
04 = 2
08 = 3
0C = 4
...
7C = 32

11, 12 - Master Tune (0 - 127, -128 - -1, in that order, interface only transmits -100 - +100)

Byte 11, 12: ?xxx xxAA ?AAA AAAx

-100 = 0E 39
...
-3 = 0F 7B
-2 = 0F 7D
-1 = 0F 7F
0 = 0C 01
1 = 0C 03
2 = 0C 05
3 = 0C 07
4 = 0C 09
5 = 0C 0B
...
100 = 0D 49

Program change, Receive (0=off, 1=on)

Byte 12: ?xxx xxxA

off = 00
on = 01

Knob mode (0=immediate, 1=hooked)

Byte 13: ???? ?xA?

40 = immediate
60 = hook

Program change, Send (0=off, 1=on)

Byte 13: ???? ?Ax?

off = 00
on = 40

Bytes 14-22 ???? ????

Slot A active (0=active, 1=inactive)

Byte 23: ???? ?Axx
active = 00
inactive = 04

Slot A midi channel (1-16)

Byte 23, 24: ???? ?xAA ?AA? ????
1 = 00 03
2 = 00 23
3 = 00 43
4 = 00 63
5 = 01 03
...
16 = 03 63

Slot B active (0=active, 1=inactive)

Byte 25: ???? ???A
active = 00
inactive = 01

Slot B midi channel (1-16)

Byte 26:   ?AAA    A???
1 = 00
2 = 08
3 = 10
    ...
16 = 78

Byte 27    ???? ????

Slot C active (0=active, 1=inactive)

Byte 28: ??Ax xxx?
active = 00
inactive = 20

Slot C midi channel (1-16)

Byte 28: ??xA AAA?
1 = 00
2 = 02
3 = 04
4 = 06
5 = 08
6 = 0A
...
16 = 1E

Byte 29 ???? ????

Slot D active (0=active, 1=inactive)

Byte 30: ???? Axxx

active = 00
inactive = 08

Slot D midi channel (1-16)

Byte 30, 31: ???? xAAA ?A?? ????
1 = 00 06
2 = 00 46
3 = 01 06
....
16 = 07 46

Byte 33 - Checksum
Byte 34 - Sysex stop

Selecting slots (Elby)

Selecting individual slots results in two 9-byte sysex messages as follows:

Slot A:

F0 33 5C 06 41 07 08 55 F7
F0 33 5C 06 41 09 00 4F F7

Slot B:

F0 33 5C 06 41 07 04 51 F7
F0 33 5C 06 41 09 01 50 F7

Slot C:

F0 33 5C 06 41 07 02 4F F7
F0 33 5C 06 41 09 02 51 F7

Slot D:

F0 33 5C 06 41 07 01 4E F7
F0 33 5C 06 41 09 03 52 F7

The first message of each pair if sent to the NM causes a slot change. The second message sets the active slot.
The encoding is as follows:

F0 33 5C 06 41 07 08 55 F7
1 2 3 4 5 6 7 8 9

Coding:

1 - Sysex start
2 - Nord's manufacturer id
3 - ????
4 - Nord's product id ?
5 - op code (slot change)
6 - selection code. 07 = change slot. 09 = set active
7 - slot id. If selection code = 07, low-order 4 bits used to designate slots in the order: ABCD. If selection code = 09, slot id is as follows: 00 = A, 01 = B, 02 = C, 03 = D.
8 - checksum. Can be computed as 46 + slot id + selection code.
9 - Sysex stop

The slot id can be used to designate multiple slots. For example, slots C and D would be slot id = 03. slots ABC would be slot id = 0E. The checksum is calculated appropriately. For C and D, checksum = 50. For ABC, checksum = 5B.