User Manual-Windows

INSTALLING THE PCI-424 HARDWARE
45
SYNCING TO VIDEO AND/OR SMPTE TIME
CODE USING A SYNCHRONIZER
If your host audio software does not support the
PCI-424’s on-board SMPTE sync features (because
your software does not support sample-accurate
sync), you need a universal synchronizer, such as a
MOTU MIDI Timepiece AV or Digital Timepiece.
These dedicated sync boxes can read video and
SMPTE time code and then convert it into word
clock and MIDI Time Code (MTC). The word
clock goes to your MOTU PCI audio interface
(such as a 2408mk3) to resolve the audio hardware,
and MIDI Time Code is fed to your host audio
software, which locks to it, as shown below in
Figure 4-25.
Figure 4-25: If your host audio software does not support sample-accurate sync and the PCI-424’s built-in
SMPTE sync features, use a universal synchronizer such as the MOTU MIDI Timepiece AV or Digital Timepiece.
PC running any audio software
MOTU MIDI Timepiece AV or
Digital Timepiece slaving to
video and/or SMPTE time code
Any MOTU PCI interface
audio cable bearing LTC
(Longitudinal Time Code)
word clock MIDI Time Code
(Via MIDI interface)
Set up your audio software to
slave to MIDI Time Code.
Video deck
or other source for video and/or SMPTE time code
Choose Word Clock In as the clock source in the MOTU PCI
Audio Console application. If you have multiple interfaces
connected, be sure to choose the Word Clock In option that
corresponds to the interface receiving the time code.
Use this setup if you have:
✓ Video and/or a SMPTE time code source.
✓ A PCI-424 system of any size.
✓ A Digital Timepiece, MIDI Timepiece AV or other universal
synchronizer.
✓ Host software that does not support sample-accurate sync
(although you can use this setup even if it does).
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.