Roland SPD-20 Owner's Manual page 101

13 EPAD2 Crosstalk Cancel
14 EPAD2 Rim Sens
15 EPAD3 Trig Type
16 EPAD3 Trig Sens
17 EPAD3 Trig Threshold
18 EPAD3 Trig Curve
19 EPAD3 Scan Time
1A EPAD3 Retrigger Cancel
1B EPAD3 Mask Time
1C EPAD3 Crosstalk Cancel
1D EPAD4 Trig Type
1E EPAD4 Trig Sens
1F EPAD4 Trig Threshold
20 EPAD4 Trig Curve
21 EPAD4 Scan Time
22 EPAD4 Retrigger Cancel
23 EPAD4 Mask Time
24 EPAD4 Crosstalk Cancel
Table 4-3 Chain setup
If you want to send Data Request to the SPD-20 in this area, set the address and the size as
follows.
Other data requests specifying address or size are ignored.
Moreover, you cannot choose the address to which the data in this section is transmitted,
nor can you choose the address from which it is received.
address = 02 00 00 00
size = 00 00 01 00
Address Map
Address Block
========== ===========
00 00 00 00 +——————-+........ +————–+........+——-+
| Patch Param. |
+——————-+.
| | .
| | .
| | .
| | .
| | .
| | . +————–+
| |
| |
01 00 00 00 +——————-+..................................... +——-+
| System setup |
02 00 00 00 +——————-+..................................... +——-+
| Chain setup |
+——————-+..................................... +——-+
5.Useful Information
[Decimal and Hexadecimal]
It is common to use 7-bit Hexadecimal numbers in MIDI communication.
The following is a conversion table between decimal numbers and 7-bit Hexadecimal num-
bers.
fig.
Hexa- Hexa-
Decimal decimal Decimal decimal Decimal
0 00H 32 20H 64
1 01H 33 21H 65
2 02H 34 22H
66
3 03H 35 23H 67
4 04H 36 24H 68
5 05H 37 25H 69
6 06H 38 26H 70
7 07H 39 27H 71
8 08H 40 28H 72
9 09H 41 29H 73
10 0AH 42 2AH 74
11 0BH 43 2BH 75
12 0CH 44 2CH 76
13 0DH 45 2DH 77
14 0EH 46 2EH 78
15 0FH 47 2FH 79
16 10H 48 30H 80
17 11H 49 31H 81
18 12H 50 32H 82
19 13H 51 33H 83
20 14H 52 34H 84
21 15H 53 35H 85
22 16H 54 36H 86
23 17H 55 37H 87
24 18H 56 38H 88
25 19H 57 39H 89
26 1AH 58 3AH 90
27 1BH 59 3BH 91
28 1CH 60 3CH 92
29 1DH 61 3DH 93
30 1EH 62 3EH 94
31 1FH 63 3FH 95
* To indicate a decimal number for the MIDI channel and Program number, add 1 to the
Decimal number in the table.
0–6
0–15
0–13
0–15
0–15
0–4
0–30
0–15
0–16
0–6
0–13
0–15
0–15
0–4
0–30
0–15
0–16
0–6
Sub block Reference
========== =========
| Patch#0 | |4-1 |
+————–+........+——-+
| Patch#1 |
+————–+
| : |
+————–+
| Patch#97 |
. | Patch#98 |
+————–+
| 4-2 |
| 4-3 |
Hexa- Hexa-
decimal Decimal decimal
40H 96 60H
41H 97 61H
42H 98 62H
43H 99 63H
44H 100 64H
45H 101 65H
46H 102 66H
47H 103 67H
48H 104 68H
49H 105 69H
4AH 106 6AH
4BH 107 6BH
4CH 108 6CH
4DH 109 6DH
4EH 110 6EH
4FH 111 6FH
50H 112 70H
51H 113 71H
52H 114 72H
53H 115 73H
54H 116 74H
55H 117 75H
56H 118 76H
57H 119 77H
58H 120 78H
59H 121 79H
5AH 122 7AH
5BH 123 7BH
5CH 124 7CH
5DH 125 7DH
5EH 126 7EH
5FH 127 7FH
* The resolution of 7-bit Hexadecimal numbers is 128. Use several bytes for values which
require more resolution.
i.e. The number "aa bbH" in 7-bit Hexadecimal is "aa x 128 + bb" in Decimal form.
* A signed number is indicated as 00H = -64, 40H =
So the signed number "aaH" in 7-bit Hexadecimal is "aa - 64".
A signed number using two bytes is indicated as 00 00H = -8192, 40 00H = 0, 7F 7FH =
+8191.
So the signed number "aa bbH" in 7-bit Hexadecimal is "aa bbH - 40 00H = aa x 128 +
bb - 64 x 128"
* The data indicated as "nibbled" is a 4-bit Hexadecimal number.
i.e. "0a 0bH" is "a x 16 + b".
<EXAMPLE 1> Convert "5AH" in Hexadecimal to a Decimal number.
(By using the table) 5AH = 90
<EXAMPLE 2> Convert "12 34H" in 7-bit Hexadecimal to a Decimal number.
(By using the table) 12H = 18, 34H = 52
So, 18 x 128 + 52 = 2356
<EXAMPLE 3> Convert "0A 03 09 0D" in nibblized form to a Decimal number.
(By using the table) 0AH = 10, 03H = 3, 09H = 9, 0DH = 13
So, {(10 x 16 + 3) x 16 + 9} x 16 + 13 = 41885
[Example of actual MIDI messages]
<EXAMPLE> C9 49
"Cn" is a status of a Program change message, and "n" is a MIDI channel number.
The second byte is a Program number. 9H = 9, 49H = 73
So, this is a Program change message of MIDI channel=10, Program number = 74.
[Checksum of Roland System Exclusive
messages]
Roland System Exclusive messages (RQ1 and DT1) have a Checksum at the end of the data
(before EOX) to be able to check for communication errors.
The Checksum results from address and data (or size) included in the message.
How to calculate Checksums ("H" indicates Hexadecimal.)
The error checking process uses a Checksum and provides a bit pattern where the last sig-
nificant 7 bits are zero when values for an address, data (or size) and the Checksum are
summed.
If the address is "aa bb ccH" and the data( or the size) is "dd ee ffH"
aa + bb + cc + dd + ee + ff = sum
sum 128 = quotient—remainder
128 - remainder = checksum
<EXAMPLE 1> Set "FX TYPE" of patch2 to 10
See the "Parameter address map"
Address: 00 01 00 03H the value of FX TYPE = 10 is 09H
F0 41 09 00 0D 12 00 01 00 03 09 ??
(1) (2) (3) (4) (5) address
(1) Exclusive Status (4) Model ID (SPD-20)
(2) ID (Roland) (5) Command ID (DT1)
(3) Device ID (09H) (6) End of Exclusive
The Checksum is:
00H + 01H + 00H + 03H + 09H = 0 + 1 + 0 + 3 + 9 = 13 (sum)
13 (sum) 128 = 0 (quotient)—13 (remainder)
checksum = 128 - 13 (remainder) = 115 = 73H
Therefore, the message to send is: F0 41 09 60 12 00 01 00 03 09 73 F7.
<EXAMPLE 2> Request to transfer the "MIDI CH" of Pad1 (BANK A), Patch 3.
See the "Parameter address map"
Address: 00 02 01 08H
Size: 00 00 00 01H
See the "Parameter address map"
Address: 00 01 00 03H
F0 41 09 00 0D 11 00 02 01 08 00 00 00 01
(1)(2)(3) (4) (5) address data
(1) Exclusive Status (4) Model ID (SPD-20)
(2) ID (Roland) (5) Command ID (RQ1)
(3) Device ID (09H) (6) End of Exclusive
The Checksum is:
00H + 02H + 01H + 08H + 00H + 00H +00H + 01H = 0 + 2 + 1 + 8 + 0 + 0 + 0
+ 1 = 12 (sum)
12 (sum) 128 = 0 (quotient)—12 (remainder)
checksum = 128 - 12 (remainder) = 116 = 74H
Therefore, the message to send is: F0 41 09 60 11 00 02 01 08 00 00 00 01 74 F7.
0, 7FH = +63.
F7
data checksum (6)
the value of FX TYPE = 10 is 09H
?? F7
checksum (6)
101
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