B Adat Id (Identification) Numbers; C Independent Slave Mode - Alesis BRC Reference Manual

the ADATs in the middle of the chain, all ADATs following it will
no longer sync to the BRC, as the sync information will not pass
through a unit that is turned off.
Figure 1

2.1B ADAT ID (identification) Numbers

After you have connected multiple ADATs and turned the machines
on (they can be turned on in any order), you may now turn on the
BRC, which will in turn assign ID numbers for each slave ADAT in
the system. This is done automatically. You will see each ADAT
momentarily display its assigned ID number. The ID numbers are
assigned in ascending order, according to the order that the slave
units are connected. So the first unit in the chain is assigned ID 1, the
second is ID 2, and so on. Anytime an ADAT or the BRC is turned on
or off, the ADATs will evaluate the situation and determine a master,
which will in turn re-assign ID numbers.

2.1C Independent Slave Mode

The BRC remote is a master controller that is used to control several
ADATs chained together to form a single multitrack recorder. The
fact that there are several slaves chained together should be
transparent, as all control will come from the BRC. However, should
you desire to operate a slave unit independently from the other units,
you may do so when the BRC remote is in one of the two STOP
modes (STOP LED on steady or flashing).
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