User`s guide
APOGEE ELECTRONICS
12
Symphony64 PCI card – User’s Guide
Using Symphony's SBus to Interconnect Apple Macintosh Computers
In addition to the wide range of hardware interfaces that may be connected to the Symphony 64 card, it’s possible
to interconnect two Symphony 64 cards installed in separate computers. Each interconnected port offers 32 chan-
nels of bidirectional digital audio. Interconnection of Symphony 64 cards is made with the same PC-32 cable used
to connect hardware interfaces.
Here are a few examples of the wide range of systems that may be created using Apogee hardware interfaces,
Symphony 64 and Symphony Mobile Cards, and Sbus-connected Macs.
Mac Pro to Mac Pro
Figure A depicts the interconnection of 2 Symphony 64-equipped Mac Pros. Hardware interfaces
(for example, 1 AD-16X and 1 DA-16X) are connected to port 1 of the rst Mac Pro, while the second
port is used for an SBus connection to another Mac. One Symphony 64 port must be used to connect
hardware, but all remaining ports may be used for SBus connections. If two Symphony 64 cards are
installed in each Mac, 96 SBus channels are available between the Macs.
When running Symphony Mobile software, driver and rmware versions dated October 2008 and later, it’s
possible to interconnect Symphony 64 and Symphony Mobile, thus allowing the interconnection of
Mac Pros and MacBook Pros.
Mac Pro to Mac Pro, Hardware Interfaces on Each Mac
Figure B depicts the Symphony setup where each Mac Pro is connected to its own set of hardware
interfaces and both Macs are interconnected via SBus. Be sure to lock all hardware interfaces to a
common sample clock. Also, note that hardware interfaces must be connected to the 1-32 port on the
primary Mac and the 33-64 port on the auxiliary Mac. More detailed SBus conguration instructions
are found on page 14.
Interconnection of 3 Macs
The interconnection of up to three Macs is supported, as depicted in Figure C.