User Manual

8BConfiguring Multiple AES16’s
9 Configuring Multiple AES16’s
More than one AES16 card can be installed in a
computer for additional audio channels. If
required, all AES16’s in a computer can be
configured to maintain sample accurate
synchronization during digital audio recording
and playback.
Cards are synchronized in a master-slave
arrangement. One card is selected as the master,
which provides the word clock source for the
other slave cards in the system. From the master,
the word clock signal is daisy-chained from one
slave to the next.
Word clock signals can be connected internally
using the CBL-ICC Internal Clock Cable, which
is available from Lynx. The CLOCK OUT
header of one card is connected to the CLOCK
IN header of the next card. A separate cable is
required for each slave card in the system.
Alternatively, the CLOCK connectors on the
CBL-AES1604 cables can be connected
externally with a standard 75 ohm BNC patch
cable.
9.1 Designating clock master and slaves
In order to select master and slave AES16’s in a
system, each adapter ID must be first physically
associated with a AES16 installed in a computer
slot. Windows 2000/XP or Macintosh OS
assigns the adapter IDs from the lowest slot
number to the highest slot number. The
procedure is as follows:
¾ Connect at least OUT1 of each AES16 to
your external mixing console or other
equipment that will provide audio
monitoring.
¾ Choose an audio application that allows
selection of wave audio devices for audio
playback.
¾ Select “AES16 1 Play 1” as the playback
device.
¾ Listen to the playback of any wave file and
note which AES16 card is generating the
audio signal. In this case, the card
generating audio is adapter 1.
¾ Repeat steps 3 and 4, for “AES16 2 Play 1”,
“AES16 3 Play 1”, and so on until all
AES16’s in your system have been
identified.
The next step is to choose which AES16 will act
as a master. This choice is based on preference
only, but for ease of connection it makes sense to
choose an AES16 that is on one end of the PCI
slot array on your motherboard.
Alternatively, if clock connections are made
externally using the CLOCK connectors on the
CBL-AES1604 cables, use BNC cables to make
connections between cards in the same sequence
as described above
.
AES16 User Manual 68