MOTU Audio Express User's Guide Page 21

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INSTALLING THE 4PRE HARDWARE
21
3 In Device Manager, open the Universal Serial
Bus Controllers section.
4 Look in the list of USB devices. An Enhanced
USB Host Controller Interface (EHCI) represents a
USB 2.0 controller. An Open USB Host Controller
Interface (OHCI) or Universal USB Host
Controller Interface (UHCI) represents a USB 1.1
controller.
If you are connecting via high-speed USB 2.0
1 Before you begin, make sure your computer and
the 4pre are switched off.
2 Plug the flat “type A plug of the 4pre USB cable
(included) into a USB2-equipped socket on the
computer as shown below in Figure 4-1.
3 Plug the squared “type B plug of the USB cable
into the 4pre I/O as shown below in Figure 4-1.
Figure 4-1: Connecting the 4pre to the computer via USB.
Switching Between FireWire and USB
Most of the time, the 4pre can detect whether a
FireWire or a USB cable is connected to it, and it
will automatically switch to FireWire operation or
USB operation accordingly. Some FireWire or USB
ports that do not provide bus power can not be
automatically detected by the 4pre, and you may
need to switch the device to FireWire mode or USB
mode manually:
When the 4pre switches to FireWire operation, it
displays F on the front panel LEDs. When it
switches to USB operation, it displays U on the
front panel LEDs.
To switch to Press and hold this knob while turning on the 4pre
FireWire INPUT 3 knob
USB INPUT 4 knob
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