Synchronization - MOTU 828es User Manual

CONNECT MIDI GEAR
Connect your MIDI device's MIDI IN jack to the
828es MIDI OUT jack (Connection A below).
Conversely, connect the MIDI device's MIDI OUT
jack to the 828es MIDI IN jack (Connection B).
MIDI
OUT
Connection A
MIDI Device
Figure 5-16: Connecting a MIDI device to the 828es.
One-way MIDI connections
MIDI devices that do not receive MIDI data, such
as a dedicated keyboard controller, guitar
controller, or drum pad, only need Connection B
shown in Figure 5-16. Similarly, devices that never
send data, such as a sound module, only need
Connection A. Make both connections for any
device that needs to both send and receive MIDI
data.
Connecting additional gear with MIDI THRUs
If you need to connect several pieces of MIDI gear,
run a MIDI cable from the MIDI THRU of a
device already connected to the 828es to the MIDI
IN on the additional device as shown below in
Figure 5-17. The two devices then share the 828es
MIDI OUT port. This means that they share the
same set of 16 MIDI channels, too, so try to do this
with devices that listen to only one MIDI channel
(such as effects modules), which makes it easier to
avoid MIDI channel conflicts.
46
828es
rear panel
MIDI
IN
MIDI
cables
Connection B
MIDI MIDI
IN OUT
828es
rear panel
MIDI
OUT
MIDI Device
Figure 5-17: Connecting additional devices with MIDI THRU ports.
CONNECT A FOOT SWITCH
If you would like to use a foot switch with your
828es, connect it to the FOOT SWITCH jack. See
item #34 in the Device tab overview (page 14) for
information about how to program the foot switch
to trigger any computer keystroke you wish.

SYNCHRONIZATION

If you connect devices digitally to your MOTU
device, or if you need to synchronize your MOTU
device with an outside time reference such as word
clock, you must pay careful attention to the
synchronization connections and clock source
issues discussed in the next few sections.
Do you need to sync?
If you will be using only your MOTU device's
analog inputs and outputs (and none of its digital
I/O), and you don't need to resolve your system to
external word clock, you don't need to make any
sync connections. You can skip this section.
Situations that require synchronization
There are two general cases in which you will need
to resolve you MOTU device with other devices:
Synchronizing with other digital audio devices
■
so that their digital audio clocks are phase-locked
(as shown in Figure 5-18)
H A R D W A R E I N S T A L L A T I O N
MIDI
IN
MIDI
MIDI
THRU
cable
MIDI IN