Specifications

HD I/O Guide12
LOOP SYNC In and Out
Loop Sync is a dedicated clock loop for synchro-
nizing multiple Pro Tools|HD peripherals to-
gether (multiple audio interfaces, or a SYNC HD
and one or more audio interfaces). Loop Sync
technology lets you synchronize to any digital
peripheral connected to any of the Pro Tools|HD
audio interfaces in your Pro Tools system. Loop
Sync uses a word clock signal based on sample
rates of either 44.1 kHz or 48 kHz. As sample
rate increases in the system, Loop Sync contin-
ues to operate at a base rate of 44.1 kHz or
48 kHz, depending upon the higher rate.
The Loop Sync In and Out ports are standard
BNC connectors that output a 1x Word clock
signal. Loop Sync should only be used to chain
multiple Pro Tools|HD peripherals together
(such as Pro Tools|HD audio interfaces and
SYNC HD).
AC Power
This connector accepts a standard AC power ca-
ble. HD I/O is auto power-selecting (100V to
240V) and will automatically work with a stan-
dard modular cable (IEC) to connect to AC
power outlets in any country.
Accessory Port
This port currently has no functionality.