Skip to content

Latest commit

 

History

History
153 lines (113 loc) · 5.97 KB

pro800syx.md

File metadata and controls

153 lines (113 loc) · 5.97 KB
Raw

Pro 800 System Exclusive implementation

Attempt at reconstructing by Sam. I did this by probing the unit with various commands.

Thanks to Sebo Synths and sw for finding some of the offsets.

To access this, you can use my very plain viewer/editor. There are also a handful of more user-friendly controllers listed at gearspace including swumpf's nice browser editor.

System exclusive head

Every system exclusive message has the following format:

F0 00 20 32 00 01 24 00 Data F7

Version request

08 00

Response:

09 00 xx yy zz where version = xx.yy.zz

Encoding 8-bit bytes as 7-bit MIDI

  • MIDI system exclusive data is 7 bits (00-7F), but Pro 800 data uses 8-bit bytes. These bytes are encoded as follows. It is slightly different from the encoding used by the GliGli Pro 600. Each sequence of seven bytes x1 x2 x3 x4 x5 x6 x7 is preceeded by a byte x0 that specifies the MSBs of the following seven bytes. The MSB of x0 specifies the MSB of x7; the LSB of x0 specifies the MSB of x1, and so on.

  • Reference for Pro 600 GliGli midi at https://www.image-et-son.com.

System Settings request

Use data:

77 7E 03

Response will be a message

78 7E 03 details

Here details describes the system settings. This is 8-bit data encoded as 7-bit midi.

Bytes offset 5 and 6 describe the current patch number, with the byte 5 the least significant.

Patch Request

77 xx yy

where xx yy is a number 0-399, as 7-bit data, with xx least significant.

This is awkward because it is slightly different from the patch numbering returned by the System Settings request, which is two 8-bit bytes.

Response:

78 xx yy details

Patch data details has the following format.

  • Once decoded, from offset 5, the details seems to appear in almost the order used by GliGli. I have checked up to Amp Envelope Shape but not beyond.
  • The patch name seems to start at index 150 (0x96) and continue until the first 0. The length varies. After the patch name there is sometimes further data (arpeggiator? sequencer)

Patch data details

Offset Operation Num bytes Mode Steps
4 Version 1 Stepped 0x6E for firmware to 1.2.7; 0x6F for firmware 1.3.6 and upwards
5 Freq A 2 Continuous
7 Vol A 2 Continuous
9 PWA 2 Continuous
11 Freq B 2 Continuous
13 Vol B 2 Continuous
15 PWB 2 Continuous
17 Fine B 2 Continuous
19 Cutoff 2 Continuous
21 Res 2 Continuous
23 Filt Env 2 Continuous
25 FE R 2 Continuous
27 FE S 2 Continuous
29 FE D 2 Continuous
31 FE A 2 Continuous
33 AE R 2 Continuous
35 AE S 2 Continuous
37 AE D 2 Continuous
39 AE A 2 Continuous
41 PM Env 2 Continuous
43 PM OscB 2 Continuous
45 LFO Freq 2 Continuous
47 LFO Amt 2 Continuous
49 Glide 2 Continuous
51 Amp Vel 2 Continuous
53 Filt Vel 2 Continuous
55 Saw A 1 Stepped Off,On
56 Tri A 1 Stepped Off,On
57 Sqr A 1 Stepped Off,On
58 Saw B 1 Stepped Off,On
59 Tri B 1 Stepped Off,On
60 Sqr B 1 Stepped Off,On
61 Sync 1 Stepped Off,On
62 PM Freq 1 Stepped Off,On
63 PM Filt 1 Stepped Off,On
64 LFO Shape 1 Stepped Pulse,Tri,Rand,Sin,Noise,Saw
65 LFO Range 1 Stepped Slow,Fast
66 LFO Target 1 Stepped Bit mask: Freq (1) / Filter (2) / PW (4) / Osc A (8) / Osc B (16) / ?? (32) / VCA (64)
67 KeyTrk 1 Stepped Off,Half,Full
68 FE Shape 1 Stepped Lin,Exp
69 FE Speed 1 Stepped Fast,Slow
70 AE Shape 1 Stepped Lin,Exp
71 Unison 1 Stepped Off,On
72 Pitchbend target 1 Off,VCO,VCF,Vol
73 Modwheel amt 1 Stepped Min,Low,High,Full
74 OscA freq mode 1 Free,Semi,Oct,FiHD
75 OscB freq mode 1 Free,Semi,Oct,FiHD
76 Mod delay 2 Continuous
82 Detune 2 Continuous
78 Vibrato speed 2 Continuous
80 Vibrato amount 2 Continuous
84 Modwheel target 1 Stepped LFO,Vib
87 Unison voice pattern 7 Bytes encoding notes, as semitone intervals above the root, or FF for mono unison
94 Per-note tuning 48 4 bytes per note (C-B). Least significant byte first. Most significant bit of fourth bit is the sign (tuning up or down). Scaling seems strange. See tuning.csv for rough values, or use examples below.
142 Noise 2 Continuous
144 VCA Aftertouch 2 Continuous
146 VCA Aftertouch 2 Continuous
148 AE Speed 1 Stepped Fast,Slow
150 Patch name ?? Text, seems to be delimited by 0. In version 0x6E, the LFO AT amount is immediately after the patch name. There are reports that if there is no LFO AT amount then the 0 delimiter may be omitted. In version 0x6F, patch name is always 16 bytes, and unused bytes are 0.
166 LFO AT amount 2 Continuous
168 Voice spread 1 Stepped On,Off (from version 0x6F)
169 Keyboard Tracking reference note 1 Stepped 0x03=C4,0x02=C3 etc (from version 0x6F)
170 Glide mode 1 Stepped Time,Speed (from version 0x6F)
171 Pitch range 2 Continuous Default = 0x00 0x60, i.e. 12 semitones. Presumably 0x0800 is one semitone. (From version 0x6F)
Per-note tuning table examples:

12TET: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Quarter-comma meantone: 00 00 00 00 ae ff 7c be 62 d6 9d bd 2b 0c d7 3d 1d 3d 07 be e7 5a 03 3d 56 47 5e be e7 5a 03 bd fc db 8d be 2b 0c d7 bd 62 d6 9d 3d 98 51 35 be

Pythagorean: 00 00 00 00 2b 0c d7 bd aa 50 2c 3d 88 5b 89 bd d3 13 a8 3d 4a ca b4 bc 65 1e 02 3e 4a ca b4 3c d3 13 a8 bd 88 5b 89 3d aa 50 2c bd 2b 0c d7 3d

Werckmeister III: 00 00 00 00 2b 0c d7 bd d3 13 a8 bd 88 5b 89 bd 2b 0c d7 bd 4a ca b4 bc 65 1e 02 be aa 50 2c bd d3 13 a8 bd 65 1e 02 be aa 50 2c bd d3 13 a8 bd

Note that the mapping from cents to values is not linear, possibly logarithmic.

Firmware update

0A ...

0B ...