D Brc Synchronization - Alesis AI-1 Reference Manual

with the incoming source. However, it is important to note that
the BRC also requires a 48kHz clock in order to be synchronized
to the incoming digital signal (see section 3.2D). Since the BRC
has nothing to do with the ADAT's optic digital bus, you will
need to route clock information from the AI-1 to the BRC by
connecting the AI-1's 48kHz output to feed the BRC's 48kHz
input (see section 2.1C).
9. Press the EDIT button to exit Edit mode (the EDIT LED will turn
off);
10. Use the TRACK SELECT buttons on the BRC to record-enable
the destination tracks;
11. Initiate recording on the BRC.
• The source tracks will be recorded onto the destination tracks in
ascending order (see previous section 3.2B regarding the
guidelines for selecting record tracks).

3.2D BRC Synchronization

It is important that, when recording from AES/EBU or S/PDIF, the
BRC is receiving synchronization information from the AI-1's 48kHz
clock out. When recording onto ADAT from an AES/EBU or
S/PDIF source, the BRC's 48kHz, SMPTE, and MIDI outputs will
not be usable if no timing reference is provided by the AI-1. While
the BRC is synchronizing to the AI-1's 48kHz clock, all of the BRC's
sync outputs will be usable. However, it is up to you to insure that
the AES/EBU or S/PDIF digital audio signal is synchronous to the
clock source that is connected to the BRC by providing it with clock
information.
When the DIGITAL I/O button is turned on and the digital input
has been set to either AES/EBU or S/PDIF, the EXT SYNC button
on the BRC will automatically turn on and disable the pitch controls
(the Pitch display will read " – – – "). The EXT SYNC's clock source
will be set to 48kHz. It is possible, however, to disable the EXT
SYNC button by pressing it without turning off the DIGITAL I/O
button. This is not recommended, since the BRC would no longer be
in perfect sync with the digital source's clock rate, which could
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