Syncing S/Pdif Devices - MOTU 828mkII User Manual

SYNCING S/PDIF DEVICES

DAT decks and other S/PDIF devices will sync to
the 828mkII in one of two ways:
Via the S/PDIF connection itself
■
Via word clock
■
S/PDIF devices with no word clock
If your DAT deck or other S/PDIF device has no
word clock sync connectors, just connect it to the
828mkII via the S/PDIF connectors. When the
device records S/PDIF audio (from the 828mkII),
it will simply synchronize to the clock provided by
the audio input.
828mkII
DAT deck
or other S/PDIF device
Figure 3-17: Two setups for synchronizing an S/PDIF device with the 828mkII. In the top diagram, sync is achieved via the S/PDIF connection
itself. In this case, you have to choose S/PDIF as the 828mkII's clock source when recording from the S/PDIF device. If you don't want to have to
worry about switching the Clock Source setting depending on the direction of the S/PDIF transfer, you can slave the S/PDIF device to word clock
from the 828mkII or vice versa (not shown). The Word Clock connection maintains sync, regardless of the direction of the transfer.
30
Internal (when transferring from the
S/PDIF
828mkII to the S/PDIF device)
S/PDIF
On the other hand, when you transfer audio from
the S/PDIF device into the 828mkII, you'll have to
slave the 828mkII to its S/PDIF input. If you have
other digital audio devices connected to the
828mkII, and they are not slaved directly to the
828mkII itself, you may hear clicks and pops
resulting from their unsynchronized audio clock. If
so, just turn them off during the transfer.
S/PDIF devices with word clock
If your S/PDIF device has a Word Clock input, slave
the S/PDIF device to the 828mkII via their word
clock connection. You can then freely transfer
audio between the 828mkII and the S/PDIF device.
828mkII
Clock Source setting =
Clock Source setting = Internal
828mkII
Word Clock Out
Word Clock In
DAT deck
or other SPDIF device
With this setup, in the MOTU FireWire Audio Console window, choose Internal, or
any other clock source setting except SPDIF. The DAT deck (or other SPDIF device)
slaves to the 828mkII via word clock for SPDIF transfers in both directions.
I N S T A L L I N G T H E 8 2 8 M K I I H A R D W A R E
828mkII
Clock Source setting =
S/PDIF (when transferring from
the S/PDIF device to the 828mkII)
828mkII
SPDIF
SPDIF