MOTU micro express-USB, User Manual

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M I D I M A C H I N E C O N T R O L
78
MMC and video
If you are working with video, and you want MMC
control of your rig from your computer software
(or MMC-compatible controller) via your Express
interface, your video deck needs to have the ability
to either:
■
Synchronize to external SMPTE time code
OR
■
Support MMC
Without either of these capabilities in your video
deck, your Express interface has no way to control
the video deck transports. You’ll instead have to use
your video deck as the transport and time code
master.
If your video deck supports the SONY 9-PIN
protocol, consider purchasing Mark of the
Unicorn’s
Digital Timepiece , which lets you control
your video deck from a computer (or other MMC
controller).
SETTING MMC DEVICE ID’S
Each MMC device requires a unique MMC device
ID, including your Express interface itself. The
factory default ID of your Express interface is 20. If
needed, you can change it as shown in Figure 6-18
on page 45 (for micro express users) or Figure 7-18
on page 65 (for Express XT users).
SETTING UP OTHER MMC DEVICES
If you have an MMC-compatible device, you can
slave it to your Express interface. But first, you need
to make your Express interface send MTC (or LTC
for some devices). To send MTC, use Express
Console to make connections from the MTC Out
port in the left-hand column to the desired
destinations in the right-hand column as
demonstrated in Figure 6-9 on page 38 (for micro
express users) or Figure 7-9 on page 58 (for
Express XT users).
For most MMC devices that support being an
MMC slave, routing time code (either MTC as just
discussed or LTC) to them is all you need to do. For
some devices, you may also need to get your
Express interface to send MMC transport
commands to the device. Once again, you do this
in the MIDI Routing window: connect the MMC
Out port in the left-hand column to the
destinations in the right-hand column as
demonstrated in Figure 6-9 on page 38 (for micro
express users) or Figure 7-9 on page 58 (for
Express XT users). Then you are ready to control
your MMC device — via your Express interface —
from the computer (or a hardware MMC
controller).
SETTING UP YOUR COMPUTER SOFTWARE
Regardless of what you decide to use as your MMC
transport control master (an MMC controller
device or computer software), you need to set up
the software so that it will slave to MIDI Time Code
(MTC) generated by your Express interface. This
will ensure that your software chases and locks
with all other MMC devices. Check to make your
software is set up to the proper frame rate, and that
it is in “external sync” or “slave” mode, waiting for
MTC.
Also see “Computer software as an MMC
controller” on page 79.
SETTING UP A HARDWARE MMC
CONTROLLER
To use any MMC transport controller, such as the
JL Cooper CuePoint™:
1 Connect the MIDI OUT and IN jacks on the
MMC controller to your Express interface.
2
Using Express Console, route MTC to the MIDI
OUT port that the MMC controller is connected to
as shown in Figure 6-9 on page 38 (for micro
!USB Interfaces Manual Book Page 78 Tuesday, October 10, 2000 12:43 PM