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!USB Interfaces Manual Book Page 63 Tuesday, August 16, 2011 11:21 AM
MTC MODE
Choose this synchronization mode when you want your
Express interface to slave to MIDI Time Code (MTC)
being sent from a device connected to one of its inputs.
This mode offers the least amount of time base stability, so
it is recommend that you try to set things up so that you
can use one of the other modes.
If you absolutely must transmit MTC from your computer
for some reason, See “Routing MTC to your MOTU
interface” on page 32 for important information about
routing MTC to your Express interface.
When your Express interface operates in MTC mode, it
locks to any MTC coming from your computer. In doing
so, however, it also “swallows” the MTC coming from the
computer. If you attempt to transmit MTC from your host
software to a specific MIDI device in your studio, it won’t
reach the MIDI device because it will get read and
“swallowed” by your Express interface. Since computergenerated MTC is not as stable as other forms of time
code, you are better off doing just the opposite: send MTC
from your Express interface to the computer, and if
necessary, control your Express interface from your
computer software via MIDI Machine Control as
demonstrated in Figure 8-1 on page 68.
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SY NC H RONIZ A T ION