
User's Guide Fireface UCX © RME
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31. Operation
Activation of the Class Compliant mode: Connect the UCX to power and switch it on. Turn the
encoder knob in Channel mode until SU appears in the display. Press the knob once to activate
Level mode. Turn the knob until CC is shown in the display, then press and hold the encoder
until the display shows on (pressing the knob again will make the display show oF, indicating
CC mode is inactive). The unit will reboot, all LEDs will light up, after which it will be in Class
Compliant mode.
Check if CC mode is active:
CC mode is active when turning the encoder lists not only CC, but
also C8 and CA in the display.
Connect the USB cable to the UCX and the Camera Connection Kit. Start iPhone/iPad and
connect the Camera Connection Kit. If everything works as expected, the unit will enter CC
Host mode, indicated by the HOST LED turning off. Audio playback in iTunes will automatically
be performed by the UCX, using analog outputs 1/2 and the phones outputs 7/8 plus
SPDIF/ADAT in parallel (mode C8).
Apps that support MIDI and are ready for Core MIDI (available since iOS 4.2) will offer dialogs
to select the desired UCX MIDI inputs and outputs.
31.1 Useful hints
If the unit is not in CC mode, the iPhone/iPad will detect an
incompatible USB device, and display a message saying
“Cannot Use Device – The connected USB device is not
supported”.
When using hard covers as back panel protection for the iPad, the Connection Kit's plug may
not fit completely, causing a loose connection or partial functionality. If in doubt, remove the
cover.
No sound: Incorrect output gain settings, see chapter 34.
The iPhone/iPad volume control is inactive during USB operation.
If the unit does not enter Host
mode: Remove and reconnect the
Connection Kit.
Correct detection and operation of
the Connection Kit itself can be
determined in Settings / General /
About. The adapter will be listed
there right after connection, with
additional details like
manufacturer, model number etc.
Connected USB devices, i.e. the
UCX will not be shown here,
though.
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