13 EPAD2 Crosstalk Cancel 0–6
14 EPAD2 Rim Sens 0–15
15 EPAD3 Trig Type 0–13
16 EPAD3 Trig Sens 0–15
17 EPAD3 Trig Threshold 0–15
18 EPAD3 Trig Curve 0–4
19 EPAD3 Scan Time 0–30
1A EPAD3 Retrigger Cancel 0–15
1B EPAD3 Mask Time 0–16
1C EPAD3 Crosstalk Cancel 0–6
1D EPAD4 Trig Type 0–13
1E EPAD4 Trig Sens 0–15
1F EPAD4 Trig Threshold 0–15
20 EPAD4 Trig Curve 0–4
21 EPAD4 Scan Time 0–30
22 EPAD4 Retrigger Cancel 0–15
23 EPAD4 Mask Time 0–16
24 EPAD4 Crosstalk Cancel 0–6
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 Sub block Reference
========== =========== ========== =========
00 00 00 00 +——————-+........+————–+........+——-+
| Patch Param. | | Patch#0 | |4-1 |
+——————-+. +————–+........+——-+
| | . | Patch#1 |
|| .+————–+
| | . | : |
| | . +————–+
| | . | Patch#97 |
| | . +————–+
| | . | Patch#98 |
| | +————–+
01 00 00 00 +——————-+.....................................+——-+
| System setup | | 4-2 |
02 00 00 00 +——————-+.....................................+——-+
| Chain setup | | 4-3 |
+——————-+.....................................+——-+
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.
* To indicate a decimal number for the MIDI channel and Program number, add 1 to the
Decimal number in the table.
* 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 = ±0, 7FH = +63.
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 ?? F7
(1) (2) (3) (4) (5) address data checksum (6)
(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 the value of FX TYPE = 10 is 09H
F0 41 09 00 0D 11 00 02 01 08 00 00 00 01 ?? F7
(1)(2)(3) (4) (5) address data checksum (6)
(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.
