MOTU 828x 28x30 Audio Interface with ThunderTechnology - Manual (Page 33)

I N S T A L L I N G T H E 8 2 8 X H A R D W A R E
33
SYNCING TO SMPTE TIMECODE
The 828x system can resolve directly to SMPTE
timecode. It can also generate timecode and word
clock, under its own clock or while slaving to
timecode. Therefore, the 828x can act both as an
audio interface and as a digital audio synchronizer
to which you can slave other digital audio devices.
You can use the 828x to slave your audio software
to SMPTE as well, via sample-accurate sync (if
your host software supports it) or via MIDI Time
Code (if your host software supports it).
Other digital audio device
slaved to the 828x
Mac running AudioDesk,
Digital Performer or other sample-
accurate software, or host software
that supports MIDI Time Code sync
(such as Pro Tools or Logic).
Figure 4-15: Connections for synchronizing the 828x directly to SMPTE timecode.
First, choose SMPTE as the clock source in AudioDesk, Digital
Performer, or MOTU Audio Setup. This setting can also be
made in the MOTU SMPTE Setup (shown below).
828x interface
SMPTE
time code
source
Audio cable bearing LTC
(longitudinal timecode)
SMPTE IN
quarter-inch jack
Thunderbolt or USB cable
Launch the MOTU SMPTE Setup to specify the timecode frame
rate and amount of freewheel. Also, confirm that the Clock
Source/Address is SMPTE/SMPTE. For details about the other
settings, see chapter 10, “MOTU SMPTE Setup” (page 115).
BNC
cable Audio
cable
SMPTE
out
Word
Out
When lockup is
achieved, the
LOCK/TACH
light glows.
In AudioDesk or Digital Performer:
1. Choose Receive Sync from the Setup menu.
2. Choose the Sample-accurate option. (If this
option is grayed out, choose SMPTE as the
clock source setting first, as shown above.)
3. Make sure that Slave to External Sync mode
is enabled.
In Pro Tools:
1. Choose Peripherals from the Setup menu.
2. Click the Synchronization tab and choose the 828x Sync Port from the MTC Reader Port menu.
Use this setup if you have:
✓
A SMPTE timecode source, such as a multitrack tape deck.
✓
An 828x by itself, OR with another slaved device (such as a dig-
ital mixer).
✓
Host software that supports sample-accurate sync (such as
Digital Performer) or MIDI Time Code (such as Pro Tools).
This setup provides:
✓
Continuous sync to SMPTE timecode.
✓
Sub-frame timing accuracy.
✓
Transport control from the SMPTE timecode source.