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MicroDexed/doc/sysex-format.txt

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Date: Sat, 25 Sep 1993 16:13:40 -0500 (CDT)
From: "Ewan A. Macpherson" <MACPHERSON@waisman.wisc.edu>
Subject: DX7 Data Format
To: xeno@iastate.edu
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Gary:
I don't know anything about the differences between the DX7 and DX7s, but this
DX7 info may be useful. I posted this to r.m.s. before xmas.
I've seen many requests for public domain / shareware DX editors, but I've
never seen a definitive reply. They're usually along the lines of "I was
roaching around on CompuServe last month, and I think I remember seeing one..."
Anyway, hope this helps ...
=========================================================================
For those interested in unpacking the uscd.edu DX7 patch data, here is
DX7 data format information.
compiled from - the DX7 MIDI Data Format Sheet
- article by Steve DeFuria (Keyboard Jan 87)
- looking at what my DX7 spits out
I have kept the kinda weird notation used in the DX7 Data Sheet to reduce
typing errors. Where it doesn't quite make sense to me I've added comments.
(And I will not be liable for errors etc ....)
Contents: A: SYSEX Message: Bulk Data for 1 Voice
B: SYSEX Message: Bulk Data for 32 Voices
C: SYSEX Message: Parameter Change
D: Data Structure: Single Voice Dump & Voice Parameter #'s
E: Function Parameter #'s
F: Data Structure: Bulk Dump Packed Format
////////////////////////////////////////////////////////////
A:
SYSEX Message: Bulk Data for 1 Voice
------------------------------------
bits hex description
11110000 F0 Status byte - start sysex
0iiiiiii 43 ID # (i=67; Yamaha)
0sssnnnn 00 Sub-status (s=0) & channel number (n=0; ch 1)
0fffffff 00 format number (f=0; 1 voice)
0bbbbbbb 01 byte count MS byte
0bbbbbbb 1B byte count LS byte (b=155; 1 voice)
0ddddddd ** data byte 1
| | |
0ddddddd ** data byte 155
0eeeeeee ** checksum (masked 2's complement of sum of 155 bytes)
11110111 F7 Status - end sysex
///////////////////////////////////////////////////////////
B:
SYSEX Message: Bulk Data for 32 Voices
--------------------------------------
bits hex description
11110000 F0 Status byte - start sysex
0iiiiiii 43 ID # (i=67; Yamaha)
0sssnnnn 00 Sub-status (s=0) & channel number (n=0; ch 1)
0fffffff 09 format number (f=9; 32 voices)
0bbbbbbb 20 byte count MS byte
0bbbbbbb 00 byte count LS byte (b=4096; 32 voices)
0ddddddd ** data byte 1
| | |
0ddddddd ** data byte 4096 (there are 128 bytes / voice)
0eeeeeee ** checksum (masked 2's comp. of sum of 4096 bytes)
11110111 F7 Status - end sysex
/////////////////////////////////////////////////////////////
C:
SYSEX MESSAGE: Parameter Change
-------------------------------
bits hex description
11110000 F0 Status byte - start sysex
0iiiiiii 43 ID # (i=67; Yamaha)
0sssnnnn 10 Sub-status (s=1) & channel number (n=0; ch 1)
0gggggpp ** parameter group # (g=0; voice, g=2; function)
0ppppppp ** parameter # (these are listed in next section)
Note that voice parameter #'s can go over 128 so
the pp bits in the group byte are either 00 for
par# 0-127 or 01 for par# 128-155. In the latter case
you add 128 to the 0ppppppp byte to compute par#.
0ddddddd ** data byte
11110111 F7 Status - end sysex
//////////////////////////////////////////////////////////////
D:
Data Structure: Single Voice Dump & Parameter #'s (single voice format, g=0)
-------------------------------------------------------------------------
Parameter
Number Parameter Value Range
--------- --------- -----------
0 OP6 EG rate 1 0-99
1 " " rate 2 "
2 " " rate 3 "
3 " " rate 4 "
4 " " level 1 "
5 " " level 2 "
6 " " level 3 "
7 " " level 4 "
8 OP6 KBD LEV SCL BRK PT " C3= $27
9 " " " " LFT DEPTH "
10 " " " " RHT DEPTH "
11 " " " " LFT CURVE 0-3 0=-LIN, -EXP, +EXP, +LIN
12 " " " " RHT CURVE " " " " "
13 OP6 KBD RATE SCALING 0-7
14 OP6 AMP MOD SENSITIVITY 0-3
15 OP6 KEY VEL SENSITIVITY 0-7
16 OP6 OPERATOR OUTPUT LEVEL 0-99
17 OP6 OSC MODE (fixed/ratio) 0-1 0=ratio
18 OP6 OSC FREQ COARSE 0-31
19 OP6 OSC FREQ FINE 0-99
20 OP6 OSC DETUNE 0-14 0: det=-7
21 \
| > repeat above for OSC 5, OSC 4, ... OSC 1
125 /
126 PITCH EG RATE 1 0-99
127 " " RATE 2 "
128 " " RATE 3 "
129 " " RATE 4 "
130 " " LEVEL 1 "
131 " " LEVEL 2 "
132 " " LEVEL 3 "
133 " " LEVEL 4 "
134 ALGORITHM # 0-31
135 FEEDBACK 0-7
136 OSCILLATOR SYNC 0-1
137 LFO SPEED 0-99
138 " DELAY "
139 " PITCH MOD DEPTH "
140 " AMP MOD DEPTH "
141 LFO SYNC 0-1
142 " WAVEFORM 0-5, (data sheet claims 9-4 ?!?)
0:TR, 1:SD, 2:SU, 3:SQ, 4:SI, 5:SH
143 PITCH MOD SENSITIVITY 0-7
144 TRANSPOSE 0-48 12 = C2
145 VOICE NAME CHAR 1 ASCII
146 VOICE NAME CHAR 2 ASCII
147 VOICE NAME CHAR 3 ASCII
148 VOICE NAME CHAR 4 ASCII
149 VOICE NAME CHAR 5 ASCII
150 VOICE NAME CHAR 6 ASCII
151 VOICE NAME CHAR 7 ASCII
152 VOICE NAME CHAR 8 ASCII
153 VOICE NAME CHAR 9 ASCII
154 VOICE NAME CHAR 10 ASCII
155 OPERATOR ON/OFF
bit6 = 0 / bit 5: OP1 / ... / bit 0: OP6
Note that there are actually 156 parameters listed here, one more than in
a single voice dump. The OPERATOR ON/OFF parameter is not stored with the
voice, and is only transmitted or received while editing a voice. So it
only shows up in parameter change SYS-EX's.
////////////////////////////////////////////////////////
E:
Function Parameters: (g=2)
-------------------------
Parameter
Number Parameter Range
--------- ---------- ------
64 MONO/POLY MODE CHANGE 0-1 O=POLY
65 PITCH BEND RANGE 0-12
66 " " STEP 0-12
67 PORTAMENTO MODE 0-1 0=RETAIN 1=FOLLOW
68 " GLISS 0-1
69 " TIME 0-99
70 MOD WHEEL RANGE 0-99
71 " " ASSIGN 0-7 b0: pitch, b1:amp, b2: EG bias
72 FOOT CONTROL RANGE 0-99
73 " " ASSIGN 0-7 "
74 BREATH CONT RANGE 0-99
75 " " ASSIGN 0-7 "
76 AFTERTOUCH RANGE 0-99
77 " ASSIGN 0-7 "
///////////////////////////////////////////////////////////////
F:
Data Structure: Bulk Dump Packed Format
---------------------------------------
OK, now the tricky bit. For a bulk dump the 155 voice parameters for each
voice are packed into 32 consecutive 128 byte chunks as follows ...
byte bit #
# 6 5 4 3 2 1 0 param A range param B range
---- --- --- --- --- --- --- --- ------------ ----- ------------ -----
0 R1 OP6 EG R1 0-99
1 R2 OP6 EG R2 0-99
2 R3 OP6 EG R3 0-99
3 R4 OP6 EG R4 0-99
4 L1 OP6 EG L1 0-99
5 L2 OP6 EG L2 0-99
6 L3 OP6 EG L3 0-99
7 L4 OP6 EG L4 0-99
8 BP LEV SCL BRK PT 0-99
9 LD SCL LEFT DEPTH 0-99
10 RD SCL RGHT DEPTH 0-99
11 0 0 0 | RC | LC | SCL LEFT CURVE 0-3 SCL RGHT CURVE 0-3
12 | DET | RS | OSC DETUNE 0-14 OSC RATE SCALE 0-7
13 0 0 | KVS | AMS | KEY VEL SENS 0-7 AMP MOD SENS 0-3
14 OL OP6 OUTPUT LEV 0-99
15 0 | FC | M | FREQ COARSE 0-31 OSC MODE 0-1
16 FF FREQ FINE 0-99
17 \
| > these 17 bytes for OSC 5
33 /
34 \
| > these 17 bytes for OSC 4
50 /
51 \
| > these 17 bytes for OSC 3
67 /
68 \
| > these 17 bytes for OSC 2
84 /
85 \
| > these 17 bytes for OSC 1
101 /
byte bit #
# 6 5 4 3 2 1 0 param A range param B range
---- --- --- --- --- --- --- --- ------------ ----- ------------ -----
102 PR1 PITCH EG R1 0-99
103 PR2 PITCH EG R2 0-99
104 PR3 PITCH EG R3 0-99
105 PR4 PITCH EG R4 0-99
106 PL1 PITCH EG L1 0-99
107 PL2 PITCH EG L2 0-99
108 PL3 PITCH EG L3 0-99
109 PL4 PITCH EG L4 0-99
110 0 0 | ALG | ALGORITHM 0-31
111 0 0 0 |OKS| FB | OSC KEY SYNC 0-1 FEEDBACK 0-7
112 LFS LFO SPEED 0-99
113 LFD LFO DELAY 0-99
114 LPMD LF PT MOD DEP 0-99
115 LAMD LF AM MOD DEP 0-99
116 | LPMS | LFW |LKS| LF PT MOD SNS 0-7 WAVE 0-5, SYNC 0-1
117 TRNSP TRANSPOSE 0-48
118 NAME CHAR 1 VOICE NAME 1 ASCII
119 NAME CHAR 2 VOICE NAME 2 ASCII
120 NAME CHAR 3 VOICE NAME 3 ASCII
121 NAME CHAR 4 VOICE NAME 4 ASCII
122 NAME CHAR 5 VOICE NAME 5 ASCII
123 NAME CHAR 6 VOICE NAME 6 ASCII
124 NAME CHAR 7 VOICE NAME 7 ASCII
125 NAME CHAR 8 VOICE NAME 8 ASCII
126 NAME CHAR 9 VOICE NAME 9 ASCII
127 NAME CHAR 10 VOICE NAME 10 ASCII
/////////////////////////////////////////////////////////////////////
And that's it.
Hope this is useful.
ewan.