User`s guide

Chapter 2: Connecting Your Studio 17
Setup A: Synchronizing Pro Tools and ADAT with an Alesis BRC
When used with a MIDI Interface, the BRC
can function as the transport master while
Pro Tools (via the ADAT Bridge I/O) is the
clock master. This configuration is best for
synchronized audio playback, recording,
and track transfer from Pro Tools to ADAT
with better than 1/4 frame accuracy.
About 44.1 Sessions with the BRC
The BRC’s 48k clock input allows you to re-
solve the BRC to the ADAT Bridge’s word
clock out. With the ADAT XT, this requires
that all sessions be at 48k in order to avoid
clock anomalies (clicks, pops).
To connect this setup:
1 Make sure your primary connections (op-
tical/lightpipe and 50-pin interface) are
correct, as described previously.
2 Connect a 9-pin sync cable from the
BRC’s Remote Out port to the (master)
ADAT’s Sync In port.
3 Connect the Word Clock Out of the
ADAT Bridge I/O to the BRC 48 kHz In.
4 Connect the MIDI In and MIDI Out of
the BRC to the appropriate MIDI In/Out of
your MIDI Interface.
Figure 3. Wiring example for a BRC-equipped system
Computer
to Pro Tools card
word clock out from ADAT Bridge I/O
to BRC 48 kHz word clock in
Pro Tools Y-cable
serial cable to
modem or printer port
ADAT
BRC
Standard MIDI Interface
ADAT 1
ADAT 2
Digidesign ADAT Bridge
optical cables in/out
BRC 9-pin remote out
MIDI in/out
MIDI
Time
Code
MIDI IN MIDI OUT
REMOTE OUT
TO ADAT
MAC SERIAL
MIDI IN
MIDI OUT
Pro Tools card
BA
50-pin
interface cables
to BRC
48 kHz word clock it