Chapter 5: Synchronizing Pro Tools and ADAT with an Alesis BRC
35
6
Use another, short BNC cable to connect
the ADAT Bridge Word Clock Out to the
BRC 48 kHz In. Try to use the shortest BNC
cable possible for word clock connections
to the BRC.
7
Make a connection from the BRC SMPTE
Out port to the LTC In port on the USD.
Make sure to set the USD positional refer-
ence to LTC, and its clock reference to In-
ternal.
Software Configuration
The following section explains how to syn-
chronize Pro Tools/ADAT with a BRC. In
this case, the BRC provides both the clock
reference signal and the positional refer-
ence. This enables you to synchronize the
ADAT and Pro Tools with near sample ac-
curacy (1/4 frame accuracy without a USD).
The Pro Tools transport is controlled by the
BRC.
You can also use MIDI Machine Control in
this (and all other) sync setups. MMC con-
figurations are covered in “Using MIDI Ma-
chine Control (MMC) with a BRC” on
page 38.
Synchronizing on Windows Systems
When using Pro Tools on a Windows com-
puter, simply make sure your MIDI inter-
face is installed and operating correctly. In-
stead of choosing OMS or FreeMIDI device
names, Pro Tools popup menus of MIDI
ports simply list the available hardware
MIDI ports of the currently installed MIDI
Interface.
Recording Tracks from an ADAT to
Pro Tools Using a BRC
This setup explains how to perform a syn-
chronized ADAT-to-Pro Tools track transfer
using a BRC.
To transfer audio from ADAT to Pro Tools:
1
Connect the BRC and MIDI Interface to
your system as shown in “Hardware Setup”
on page 34.
On the BRC:
2
Make sure the EXT SYNC button is off
(unlit).
3
Enable the GEN SYNC button on the
BRC. This enables the BRC to generate time
code.
Connecting a USD and BRC to an ADAT Bridge
optional Y cable
(available separately)
to primary Pro Tools
audio card port "A"
to “Computer A” port
to port "B"
to “Computer B” port
optical cables
Alesis 9-pin sync cable
optical cables
ADAT 1
ADAT 2
50-pin
interface cables
ADAT Bridge
MTC OUT
MAC SERIAL
85-264VAC, 47-63HZ, 115 W
SUPER CLOCK (256X)
PC SERIAL
BI-PHASE / TACH / GPI
VIDEO REF
9-PIN OUT
9-PIN IN / ACC
WORD CLOCK
VIDEO
L
T
C
I
N
A
E
S
I
N
A
E
S
O
U
T
L
T
C
O
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T
IN
OUT
IN
OUT
IN
OUT
to DigiSerial port
Slave Clock In
USD Slave Clock Out
ADAT BRC
MIDI IN
MIDI OUT
REMOTE OUT
TO ADAT
to BRC 48 kHz In
Word Clock Out
SlaveClock Out
SMPTE Out
LTC In
to ADAT Sync In
Summary of Contents for ADAT Bridge I/O
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Page 44: ...ADAT Bridge I O 40 ...
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