User Manual-Mac

CHAPTER
101
11 Expanding Your PCI-424 System
OVERVIEW
Up to four MOTU PCI audio interfaces can be
connected to a single PCI-424 card for up to 96
simultaneously active inputs and outputs. For
example, if you connect four 2408mk3 interfaces,
you get a total of 232 and 248 physical input and
output connections (respectively) and up to 96
input and output channels. You can freely “mix and
match” any MOTU PCI audio interfaces together
on a single PCI-424 card, including the 24I/O,
HD192, 2408, 2408mkII, 1296, 1224, 24i and 308
models.
The PCI-424 card, with its CueMix DSP engine,
ties all connected audio interfaces together,
allowing them to act as a massive audio routing
matrix for mixing, merging, splitting and routing
to/from all connected inputs and outputs.
MOTU PCI audio interfaces are sold separately as
expanders for any MOTU core system. See your
MOTU dealer for details.
Connecting expansion interfaces. . . . . . . . . . . .101
Multiple interfaces in the Console . . . . . . . . . . .101
Enabling banks, or individual ins and outs . . .102
Working with input and output menus . . . . . .102
CueMix DSP routing among interfaces . . . . . .102
Synchronizing multiple interfaces. . . . . . . . . . .103
Word clock connections are not necessary . . .103
Sample rate issues . . . . . . . . . . . . . . . . . . . . . . . . .103
PCI bandwidth issues. . . . . . . . . . . . . . . . . . . . . .103
CONNECTING EXPANSION INTERFACES
Connect expansion interfaces to the three available
Audio Wire sockets on your core system’s PCI-424
card as shown below in Figure 11-1.
Figure 11-1: You can connect up to four MOTU PCI audio interfaces to
a single PCI-424 card.
MULTIPLE INTERFACES IN THE CONSOLE
The MOTU PCI Audio Console window displays
the settings for one PCI-424 interface at a time. To
choose which I/O you are looking at, choose it
from the Configure Interface menu as shown below
in Figure 11-2.
Figure 11-2: Choosing which audio interface you are working with in
the MOTU PCI Audio Console window.
Core system interface (#1)
Interface #2
Interface #3
Interface #4