52
Using the DATA Port
The
DATA
port on the SR40•8/56•8 mirrors
the
MIDI
ports, transferring MIDI information
between an external computer’s RS-232 serial
port and
ULTRA MUTE
. The only difference be-
tween using the DATA and MIDI ports is the
rate of transmission of the data and the gen-
eral physical hardware (9-pin Sub D vs. 5-pin
DIN, respectively). The actual data transferred
is the same.
The
DATA
port provides two-way communi-
cation of data between devices. Pin 2 is RXD
(receiving line), pin 3 is TXD (transmitting
line) and pin 5 is ground (shield).
If your computer has an RS-232 port, the
connecting cable should be wired as follows:
Use the following serial communications
parameters when using the
DATA
port:
Baud rate
19.2k
1
Parity
None
Data bits
8
Stop bits
1
1
The RS-232 serial port is configured to oper-
ate at 19.2k baud at the factory. An internal
jumper provides the option of changing the
baud rate to 9600 baud or 38.4k baud. Please
refer to the SR40•8/SR56•8 Service Manual,
or contact Mackie Technical Support at 1-800-
258-6883 (8am to 5pm PST), for details.
Note:
The MIDI port operates at 31.25k baud,
as defined by the MIDI Manufacturers
Association’s (MMA) MIDI Specification.
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
RXD
TXD
GND
RXD
TXD
GND
DB9
FEMALE
DB9
MALE
TO
COMPUTER
(RS-232 PORT)
TO
CONSOLE
(DATA PORT)
STANDARD DB9
COMPUTER CABLE
MIDI IMPLEMENTATION SUMMARY
• When you first power up the console, a
number briefly appears in
ULTRA MUTE
’s
numeric display. This is the version
number of the firmware stored in the
ROM memory. Version 1.2 was installed
in the first shipments of the SR40•8
console. See next column for notes
regarding version 1.2 of the firmware.
• Use MIDI Note Messages to turn on and
off individual mute nodes or to recall
individual mute groups within a set (refer
to Appendix B).
ULTRA MUTE
must be in
group mode.
• Use Program Change Messages to recall
individual snapshots.
ULTRA MUTE
must
be in snapshot mode.
• Use Sysex Messages to backup
ULTRA
MUTE
’s memory (refer to MIDI Sysex
chart on page 11). Sysex Messages are
recognized in any mode, including
system bypass.
Notes regarding version 1.2 of the firmware:
1. MIDI Sysex Message number “00 00”
(requests all snapshots, all at once) may
encounter errors due to buffer problems in
some sequencing software. If you are
unable to successfully execute this request,
use “00 01” (requests all snapshots, one at
a time).
2. MIDI Sysex Message numbers “02 00” (re-
quests all groups, all at once) and “02 01”
(requests all groups, one at a time) do not
work in this version. Sets 1-8 are trans-
ferred, but not Set 9. A suggested
workaround is to create a string using mes-
sage request number “03” to request groups
from each of the nine sets. For example:
®
