User`s guide

CHAPTER
EXPANDING YOUR PCIE-424 SYSTEM
13
4 Expanding Your PCIe-424 System
OVERVIEW
Up to four MOTU PCI audio interfaces can be connected to
a single PCIe-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
PCIe-424 card, including the 24I/O, HD192, 2408,
2408mkII, 1296, 1224, 24i and 308 models.
The PCIe-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 . . . . . . . . . . . . . . . . . . . . 13
Multiple interfaces in the Console. . . . . . . . . . . . . . . . . . . . 13
Enabling banks, or individual ins and outs. . . . . . . . . . . . 13
Working with input and output menus . . . . . . . . . . . . . . . 14
CueMix DSP routing among interfaces . . . . . . . . . . . . . . . 14
Synchronizing multiple interfaces . . . . . . . . . . . . . . . . . . . 14
Word clock connections are not necessary . . . . . . . . . . . . 14
Sample rate issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
CONNECTING EXPANSION INTERFACES
Connect expansion interfaces to the three available Audio
Wire sockets on your core system’s PCIe-424 card as shown
below in Figure 4-1.
Figure 4-1: You can connect up to four MOTU PCI audio interfaces to a single
PCIe-424 card.
MULTIPLE INTERFACES IN THE CONSOLE
The MOTU PCI Audio Console window displays the settings
for one PCIe-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 4-2.
Figure 4-2: Choosing which audio interface you are working with in the MOTU PCI
Audio Console window.
Enabling banks, or individual ins and outs
Bank enabling, or enabling individual inputs and outputs,
works the same for each interface in the MOTU PCI Audio
Console window. Choose an interface from the Configure
Interface menu (Figure 4-2) and then configure the banks
(or individual outputs) as usual.
Core system interface (#1)
Interface #2
Interface #3
Interface #4