User`s guide

INSTALLING THE PCI-424 HARDWARE
44
SYNCING TO VIDEO
The 2408mk3 interface can continuously resolve
directly to video, while at the same time
referencing SMPTE time code, with no additional
synchronization device required. When you
choose video as the clock source (as shown below),
the Word Clock BNC connector switches to a video
input. Both NTSC and PAL/SECAM rates are
supported. The MOTU SMPTE Console software
provides options for freewheeling both time code
and video time base. To resolve your audio
software to video as well, it must support sample-
accurate sync. For details, see “Is your audio
software sample-accurate?” on page 39.
Figure 4-24: Connections for synchronizing the 2408mk3-based
PCI-424 system directly to video.
2408mk3 interface
Video deck
or other video source
audio cable bearing LTC
(Longitudinal Time Code)
SMPTE IN
RCA jack
(or any analog input)
Launch the MOTU SMPTE Console and specify the SMPTE Source, which is the
analog input receiving the SMPTE time code. Also, confirm that the Clock
Source is PCI-424: SMPTE/SMPTE. For details about the other settings, see
chapter 12, “MOTU SMPTE Console” (page 103).
WORD (video) IN
BNC jack
Video cable
Other digital audio
device slaved to the
2408mk3
Audio Wire cable
PCI-424 card
video
cable
audio
cable
SMPTE
out
Word
Out
When lockup is
achieved, the LOCK
light illuminates and
the TACH light blinks
once per second.
Choose PCI-424: Video as the clock source in the MOTU PCI Audio Console applica-
tion. This setting can also be made in the MOTU SMPTE Console (shown below).
Windows computer running Cubase or
other sample-accurate ASIO software
In Cubase VST, go to the Synchronization window and
choose ASIO 2.0 as the Timecode Base. In Cubase SX, go to
the Synchronization Setup window and choose the ASIO
Positioning Protocol option.
Use this setup if you have:
✓ A video deck or other video source, with SMPTE time code.
✓
A 2408mk3 core system by itself, OR a small 2408mk3 system
that includes other MOTU PCI interfaces and maybe one other
device (such as a digital mixer) slaved to the 2408mk3.
✓ Host software that supports sample-accurate sync.
This setup provides:
✗
No sample-accurate locating.
✓ Continuous sync to SMPTE time code.
✓ Sub-frame timing accuracy.
✓ Transport control from the SMPTE time code source.