MOTU micro express-USB, Руководство пользователя

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M I D I M A C H I N E C O N T R O L W I T H T H E A V
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There is no advantage to doing MMC this way; in
fact, it will probably not provide as stable a time
base as the MIDI Timepiece AV does in the
recommended scenario described in the previous
section. You should only really use this setup if you
have a MMC device that does not have the ability to
be a time code slave and therefore must be the
master.
MMC and video
If you are working with video, and you want MMC
control of your rig from your computer software
(or LRC-compatible controller) via the MIDI
Timepiece AV, your video deck needs to have the
ability to either:
■
Synchronize to external SMPTE time code
(while locked to house sync)
OR
■
Support MMC
Without either of these capabilities in your video
deck, the MIDI Timepiece AV has no way to
control the video deck transports. You’ll instead
have to use your video deck as the transport and
address master.
If your video deck supports the SONY 9-PIN
protocol, consider purchasing Mark of the
Unicorn’s Digital Timepiece, which lets you to
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 the MIDI Timepiece AV itself. For
convenience, the MIDI Timepiece AV
automatically sets the device ID’s of all ADATs
chained from its ADAT sync port. This means that
you don’t have to do anything in regard to setting
the device ID’s of your ADATs. The factory default
ID of the MIDI Timepiece AV is 20, and the default
ID of the first ADAT connected to the MIDI
Timepiece AV is 1. Other chained ADATs are
automatically set to ID’s 2, 3, and so on. You can
change these defaults if you’d like.
To change the MMC device ID in the MIDI
Timepiece AV using the front panel LCD:
1
Use the WINDOW knob to go to GLOBAL
HARDWARE SETUP.
2
Turn the CURSOR knob clockwise until you see
the MMC device ID window as shown below.
3
Use the CURSOR and VALUE knobs to give the
MTP AV and the first ADAT unique MMC device
ID’s.
Connecting ADAT(s) to the MIDI Timepiece AV
Once you’ve connected a chain of ADATs to the
MIDI Timepiece AV, they do not require any
further preparation. The MIDI Timepiece AV takes
care of setting their MMC device ID’s and
establishing communication with them.
SETTING UP OTHER MMC DEVICES
If you have an MMC-compatible device (other
than an ADAT), you can slave it to the MIDI
Timepiece AV. But first, you need to make the MIDI
Timepiece AV send MTC (or LTC for some
devices). To send MTC, use the SMPTE
DESTINATION window in the front panel LCD
(it’s in the SMPTE/sync menu). Or you can do so in
MTP AV Console by making connections from the
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!USB Interfaces Manual Book Page 132 Tuesday, October 10, 2000 12:43 PM