User Manual

HARDWARE INSTALLATION
45
ensures that audio recorded by DAW host software
on a connected computer, or audio playing back
from the DAW, will remain resolved to time code
and won’t drift over time, even when restarting or
cueing the source time code.
☛ Depending on the stability of the incoming
time code, it may take a few seconds for your
interface to lock to the time code. The more stable
the incoming time code, the faster the lock-up
time.
SMPTE time code (LTC) settings
There are several settings for the time code features
in your MOTU interface. In the web app, go to the
Device tab (page 14) and scroll to the LTC Setup
section, shown below.
Figure 4-14: Settings for SMPTE time code sync.
LTC Input S ource
Choose the input on your interface that is receiving
the time code (LTC). Any input can be used,
including an analog input, digital input or even an
AVB network channel.
Computer Channel for LTC-to-MTC Conversion
Choose a computer channel that you aren’t using
for anything else here. It will be used to transmit
LTC from the interface to the computer. If all of
your computer channels are being used, you can
add extra channels using the To c o m p u te r setting in
the Routing tab. See “LTC-to-MTC conversion” on
page 61 for further info about LTC-to-MTC
conversion.
LTC For m at
Choose the frame format that matches the
incoming time code.
Enable Format Autodetect
If you would like your MOTU interface to
automatically detect the frame format of the
incoming time code, check this box.
Enable Jam Sync
When this option is checked, your MOTU interface
will continue to convert LTC to MTC even after
incoming time code stops being received. Once
Jam Sync kicks in, it will continue generating until
you click Stop Jam Sync.
SYNCING AN AVB NETWORK
The AVB protocol provides sophisticated and
accurate timing, synchronization, and clocking
features for AVB device networks of any size as
shown on pages 35-36, including:
■ Low latency
■ Network-wide time base
■ Better-than-sample-accurate phase lock across
all connected devices
■ Timing accuracy down to the nanosecond
Choosing a master clock
The web app provides an easy way to choose one
device as the master clock for your whole MOTU
AVB network.
1 Go to the Devices tab (page 12).
2 In the device list (item #1 on page 12), choose
the MOTU interface you wish to use as the clock
master.