User`s guide

Pro Tools Reference Guide354
Setting Minimum Sync Delay
Lock up delay is the amount of time your
system’s devices need to achieve synchro-
nization “lock.” This amount varies for
each device. Pro Tools lock up delay is set
by entering a value for Minimum Sync De-
lay in the Synchronization window of the
Peripherals dialog. The minimum delay is
15 frames. Find the shortest possible lock-
up time that your equipment can operates
at consistently, and set this as the Mini-
mum Sync Delay. On some machines, en-
abling the Use Serial time code setting will
make machines lock up much faster.
Configuring Minimum Sync Delay for External
MMC Devices Locked to House Sync
When controlling a house-synced device
from Pro Tools via MMC, the device will
first lock to the MMC location and then
align the color framing. Within house sync
code are 4 frames for ensuring color frame
lock. If the minimum synchronization set
up time is less than the time required to
achieve both location and color frame lock,
playback will begin before the device has
aligned the color frames. In this scenario,
you should set the Minimum Sync Delay to
be more than the time required for color
frame lock. This is not a problem with the
USD, which will drop out of lock until the
color frame is locked.
Using MMC to Sync an ADAT to
Pro Tools on the Macintosh
The following section presents an example
of how you can use MMC to slave an ADAT
to Pro Tools on a Macintosh using OMS.
Setup Description:
Hardware: Pro Tools system (Macintosh),
Opcode Studio 64X MIDI Interface,
JL Cooper DataMaster, Alesis ADAT.
Software: Pro Tools, OMS
Cable Connections: The Studio 64X’s
Mac/Serial port is connected to one of the
CPU serial ports (Modem or Printer). MIDI
In and MIDI OUT connections are made
between the appropriate ports of the 64X
and the MIDI IN/MIDI OUT ports of the JL
Cooper DataMaster. Sync (9-pin) In/Out
connections are made between the JL Coo-
per DataMaster and the ADAT.
In OMS Setup:
1 Make sure the OMS IAC Driver is in-
stalled and configured. See “Syncing a Se-
quencer to Pro Tools on the Macintosh” on
page 349 for more information.
2 Define a new device for the JL Cooper
DataMaster and the ADAT.
3 Configure the JL Cooper device by dou-
ble-clicking its icon in the OMS Studio
Setup window. For the JL Cooper Data-
Master, enable Is Controller, then enable
both Sends and Receives MIDI Time Code.
(Be sure to leave Is Multitimbral un-
checked.) Select channel 1 as the Receive
Channel.