D I G I T A L T I M E P I E C E & P R O T O O L S
91
PRO TOOLS AND TRIPLE-SYNC
The term
triple-sync
refers to a special form of
synchronization employed in the following Digital
Timepiece modes:
■
Word 1x/Video/Internal
■
Word 1x/Video/MTC
■
Word 1x/Video/LTC
■
Word 1x/Video/VITC
■
Word 1x/Video/Sony
As you can see, these modes allow the Digital
Timepiece to simultaneously reference word clock
(for time base) and video (for accurate frame-edge
alignment). At the same time, the Digital
Timepiece can follow SMPTE address from a third
source (Internal, LTC, MTC, VITC or SONY).
These triple-sync modes require video house sync
(“blackburst”), as well as a word clock source that
can resolve to house sync, such as a Tascam SY-88
card or an Aardvark Aardsync™ video-to-word
clock converter. When you connect them to the
Digital Timepiece as demonstrated in Figure 12-7
on page 90, this setup provides the tightest
synchronization and fastest lockup times possible
with the Digital Timepiece and Pro Tools. Our tests
have shown that with an accurate word clock
source like the Aardsync converter, consecutive
record passes into Pro Tools are within 5-10
samples of each other. This level of accuracy can be
achieved even when recording from an analog
audio source such as a video deck (as long as the
video deck is resolved to house sync as well).
How to set up triple-sync with Pro Tools
Follow the same directions for setting up Pro Tools
as a slave, starting with “Essential connections” on
page 88. When choosing a time base mode for the
Digital Timepiece, use the appropriate triple-sync
mode listed above. Everything else about slaving
Pro Tools — including ClockWorks, Performer,
Digital Performer and OMS-dependent sequencers
— works with triple-sync as well.
TRANSPORT CONTROL
Each Pro Tools setup discussed in this chapter
dictates possible sources for transport control over
the rig as a whole. If you feel strongly about what
you would like to use for transport control, here is
a summary of your options.
If you want to control everything from the
transport window in the Pro Tools software
running on your Mac, you have to use the sync
scenario discussed in “Pro Tools as master” on
page 86.
As of Pro Tools version 4.01, there is no way for Pro
Tools to share transport control with another
source, such as a sequencer. So when you run Pro
Tools as the master, you’ll only be able to use the
transports in Pro Tools.
If you want to control Pro Tools from any other
transport control surface, either hardware or
software, you have to slave Pro Tools to the Digital
Timepiece as discussed in either “Pro Tools as
slave” on page 88 or “Pro Tools and Triple-sync” on
page 91.
One advantage to slaving Pro Tools is that you can
often arrange multiple transport control sources
for your convenience — if your setup allows it. For
example, if you are running the Digital Timepiece
in one of its internal modes (such as the triple-sync
mode
word 1x/video/internal
), you can trigger it
from ClockWorks, Performer (or other MMC-
compatible sequencer), an Alesis LRC connected
to the Digital Timepiece, or any other MMC
control surface.
As far as setting up transport control over
everything from your Mac, you have the following
possibilities:
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