Syncing S/Pdif Devices - MOTU 828 Mk III Hybrid User Manual

SYNCING S/PDIF DEVICES

S/PDIF devices will sync to the 828mk3 in one of
two ways:
Via the S/PDIF connection itself
■
Via word clock
■
S/PDIF devices with no word clock
If your S/PDIF device has no word clock sync
connectors, just connect it to the 828mk3 via the
S/PDIF connectors. When the device records
S/PDIF audio (from the 828mk3), it will simply
synchronize to the clock provided by the audio
input.
828mk3
DAT deck
or other S/PDIF device
Figure 4-18: Two setups for synchronizing an S/PDIF device with the 828mk3. In the top diagram, sync is achieved via the S/PDIF connection
itself. In this case, you have to choose S/PDIF as the 828mk3'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 828mk3 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
828mk3 to the S/PDIF device)
S/PDIF
On the other hand, when you transfer audio from
the S/PDIF device into the 828mk3, you'll have to
slave the 828mk3 to its S/PDIF input. If you have
other digital audio devices connected to the
828mk3, and they are not slaved directly to the
828mk3 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 828mk3 via their word
clock connection. You can then freely transfer
audio between the 828mk3 and the S/PDIF device.
828mk3
Clock Source setting =
Clock Source setting = Internal
828mk3
Word Clock Out
Word Clock In
DAT deck
or other SPDIF device
With this setup, in the MOTU Audio Console window, choose Internal, or any other
clock source setting except SPDIF. The DAT deck (or other SPDIF device) slaves to the
828mk3 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 3 H A R D W A R E
828mk3
Clock Source setting =
S/PDIF (when transferring from
the S/PDIF device to the 828mk3)
828mk3
SPDIF
SPDIF