RME Fireface UCX II User manual
User's Guide
Fireface UCX II
The most powerful USB audio interface ever!
USB 2.0 Digital I/O System
8 Channel Analog Interface
2 + 2 Channel AES / SPDIF Interface
8 Channel ADAT Interface
24 Bit / 192 kHz Digital Audio
40 x 20 Matrix Router
MIDI Input / Output
Full Stand-Alone Operation
Direct USB Recording
Class Compliant Operation
TotalMix FX
™
24 Bit / 192 kHz
SyncCheck
™
SteadyClock FS
™
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User's Guide Fireface UCX II © RME
Safety Instructions and Proper use
Read the manual carefully and completely before using the device. Pay attention to
the following information on how to use and operate the Fireface UCX II safely. Improper use can lead to loss of warranty claims (see warranty statement on page 82).
Proper Use
The Fireface UCX II is a digital interface for professional audio applications for use with CE approved class B computers.
To comply with the European CE standard, the Fireface UCX II must be used
with CE approved Class B computers. All connecting cables must be shielded.
The computer and all cables connected to the Fireface UCX II must be properly grounded. Operation with non-certified computers and cables may cause
interference to other devices as well as the Fireface UCX II.
Do not open chassis
No user serviceable parts inside. Refer service to qualified service personnel.
To reduce the risk of fire or electric shock do not expose this device to rain or
moisture. Prevent moisture and water from entering the device. Never leave a
pot with liquid on top of the device. Do not use this product near water, i. e.
swimming pool, bathtub or wet basement. Danger of condensation inside –
don't turn on before the device has reached room temperature.
Installation
Surface may become hot during operation – ensure sufficient ventilation.
Avoid direct sun light and do not place it near other sources of heat, like radiators or stoves. When mounting in a rack, leave some space between this
device and others for ventilation.
Unauthorized servicing/repair voids warranty. Only use accessories specified by the
manufacturer.
User's Guide Fireface UCX II © RME
3
Safety Instructions and Proper Use ....................... 2
General
1 Introduction ............................................................... 8
2 Package Contents ..................................................... 8
3 System Requirements .............................................. 8
4 Brief Description and Characteristics ..................... 8
5 First Usage - Quick Start
5.1 Connectors – Controls - Display ............................. 9
5.2 Quick Start ............................................................ 11
5.3 Menu and Navigation ............................................ 11
5.4 Overview Menu Structure ...................................... 13
5.5 Special Options ..................................................... 14
Installation and Operation - Windows
6 Hardware, Driver and Firmware Installation
6.1 Hardware and Driver Installation .......................... 16
6.2 De-installing the Drivers ....................................... 16
6.3 Firmware Update ................................................. 16
7 Configuring the Fireface – Settings Dialog
7.1 General ................................................................ 17
7.2 Pitch ..................................................................... 19
7.3 Option WDM Devices .......................................... 20
8 Operation and Usage
8.1 Playback ............................................................... 20
8.2 DVD Playback (AC-3 / DTS) ................................ 21
8.3 Channel Count under WDM ................................. 22
8.4 Multi-client Operation ........................................... 22
8.5 Analog Recording................................................. 23
8.6 Digital Recording .................................................. 23
8.7 Clock Modes - Synchronization ............................ 24
9 Operation under ASIO
9.1 General ................................................................ 25
9.2 Channel Count under ASIO ................................. 25
9.3 Known Problems .................................................. 26
10 Using more than one Fireface UCX II .................... 26
11 DIGICheck Windows ............................................... 27
12 Hotline – Troubleshooting ..................................... 28
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User's Guide Fireface UCX II © RME
Installation and Operation - Mac OS X
13 Hardware, Driver and Firmware Installation
13.1 Hardware and Driver Installation .......................... 30
13.2 De-installing the Drivers ....................................... 30
13.3 Firmware Update .................................................. 30
14 Configuring the Fireface
14.1 Settings Dialog ..................................................... 31
14.2 Clock Modes - Synchronization ............................ 33
15 Mac OS X FAQ
15.1 MIDI doesn't work ................................................. 34
15.2 Repairing Disk Permissions ................................. 34
15.3 Supported Sample Rates ..................................... 34
15.4 Channel Count under Core Audio ........................ 34
15.5 Various Information .............................................. 35
16 Using more than one Fireface ................................ 35
17 DIGICheck Mac ........................................................ 36
18 Hotline – Troubleshooting ...................................... 37
Inputs and Outputs
19 Analog Inputs
19.1 Line Rear .............................................................. 40
19.2 Microphone / Line Front ....................................... 40
19.3 Instrument / Line Front ......................................... 41
20 Analog Outputs
20.1 Line ....................................................................... 42
20.2 Headphones / Line Out ........................................ 42
20.3 DC-coupled Outputs (CV/Gate) ........................... 43
21 Digital Connections
21.1 ADAT .................................................................... 44
21.2 AES/EBU .............................................................. 44
21.3 SPDIF (Coaxial, Optical) ...................................... 45
21.4 MIDI ...................................................................... 45
22 Word Clock
22.1 Word Clock Input / Output .................................... 46
22.2 Technical Description and Background ................ 47
22.3 Cables and Termination ....................................... 48
22.4 General Operation ................................................ 48
Stand-Alone Operation
23 Operation and Usage
23.1 General ................................................................. 50
23.2 Settings at the Unit ............................................... 50
23.3 Store / Load Setups at the Unit ............................ 50
23.4 Storing Setups from the Computer....................... 50
24 Examples
24.1 8-Channel AD/DA-Converter ................................ 51
24.2 2-Channel Mic Preamp ........................................ 51
24.3 Monitor Mixer ........................................................ 51
24.4 Digital Format Converter ...................................... 51
24.5 Analog/Digital Routing Matrix ............................... 51
24.6 Stand-Alone Recorder/Player ............................... 51
User's Guide Fireface UCX II © RME
5
TotalMix FX
25 Routing and Monitoring
25.1 Overview .............................................................. 54
25.2 The User Interface ............................................... 56
25.3 The Channels ....................................................... 57
25.3.1 Settings ........................................................ 59
25.3.2 Equalizer ...................................................... 60
25.3.3 Dynamics ..................................................... 62
25.4 Section Control Room .......................................... 63
25.5 The Control Strip .................................................. 64
25.5.1 View Options ................................................ 65
25.5.2 Snapshots - Groups ..................................... 66
25.5.3 Channel Layout – Layout Presets ................ 67
25.5.4 Scroll Location Markers ................................ 68
25.6 Reverb and Echo ................................................. 69
25.7 Preferences .......................................................... 72
25.7.1 Store for Current or All Users ....................... 73
25.8 Settings ................................................................ 74
25.8.1 Mixer Page ................................................... 74
25.8.2 MIDI Page .................................................... 75
25.8.3 OSC Page .................................................... 76
25.8.4 Aux Devices ................................................. 77
25.9 Hotkeys and Usage .............................................. 78
25.10 Menu Options ....................................................... 79
25.11 Menu Window ...................................................... 80
26 The Matrix
26.1 Overview .............................................................. 80
26.2 Elements of the Matrix View ................................ 80
26.3 Operation ............................................................. 81
27 Tips and Tricks
27.1 ASIO Direct Monitoring (Windows) ...................... 81
27.2 Copy a Submix ..................................................... 81
27.3 Doubling the Output Signal (Mirror) ..................... 81
27.4 Delete a Submix ................................................... 82
27.5 Copy and Paste everywhere ................................ 82
27.6 Recording a Submix - Loopback .......................... 82
27.7 MS Processing ..................................................... 83
28 MIDI Remote Control
28.1 Overview .............................................................. 84
28.2 Mapping ............................................................... 84
28.3 Setup .................................................................... 85
28.4 Operation ............................................................. 85
28.5 MIDI Control ......................................................... 86
28.6 Stand-Alone MIDI Control .................................... 87
28.7 Loopback Detection ............................................. 89
28.8 OSC (Open Sound Control) ................................. 89
29 DAW Mode ............................................................... 89
30 TotalMix Remote ..................................................... 90
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User's Guide Fireface UCX II © RME
Class Compliant Mode
31 General ..................................................................... 94
32 System Requirements ............................................. 94
33 Operation ................................................................. 95
33.1 Useful Hints .......................................................... 95
33.2 Class Compliant under Windows/Mac OS X ........ 96
34 Supported Inputs and Outputs .............................. 96
35 Front panel Operation ............................................. 97
36 Audio Routing and Processing .............................. 97
37 Setups....................................................................... 98
DURec - Direct USB Recording
38 Direct USB Recording
38.1 Overview ............................................................ 100
38.2 Operation ............................................................ 100
38.3 Limitations and Important Notes ........................ 103
38.4 Multichannel WAV File Batch Processor............ 104
38.5 Technical Background ........................................ 105
Technical Reference
39 Technical Specifications
39.1 Analog ................................................................ 108
39.2 MIDI .................................................................... 109
39.3 Digital ................................................................. 109
39.4 Digital Inputs ....................................................... 109
39.5 Digital Outputs .................................................... 110
39.6 General ............................................................... 110
40 Technical Background
40.1 Lock and SyncCheck ......................................... 111
40.2 Latency and Monitoring ...................................... 112
40.3 USB Audio .......................................................... 113
40.4 DS – Double Speed ............................................ 114
40.5 QS – Quad Speed .............................................. 114
40.6 Noise Level in DS / QS Mode ............................. 115
40.7 SteadyClock ....................................................... 115
41 Diagrams
41.1 Block Diagram Fireface UCX II .......................... 116
41.2 Connector Pinouts .............................................. 117
Miscellaneous
42 Accessories ........................................................... 120
43 Warranty ................................................................. 120
44 Appendix ................................................................ 121
45 Declaration of Conformity .................................... 122
User's Guide Fireface UCX II © RME
7
User's Guide
Fireface UCX II
General
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User's Guide Fireface UCX II © RME
1. Introduction
Thank you for choosing the Fireface UCX II. This unique audio system is capable of transferring
analog and digital audio data directly to Windows and Mac computers. The latest Plug and Play
technology guarantees a simple installation, even for the inexperienced user. Numerous unique
features like a well thought-out Settings dialog and an integrated routing solution realize a quick,
comfortable and efficient operation of the Fireface UCX II.
The package contains drivers for Windows 7 / 8 / 10 and Mac OS X x86 (Intel).
2. Package Contents
Please check your Fireface UCX II package contains each of the following:
Fireface UCX II
Cable USB 2.0, 1.8 m (6 ft)
External switched power supply, lockable connector, DC 12 V 24 W
Power cord
3. System Requirements
Windows 7 or up, Intel Mac OS X (10.6 or up)
1 x USB 2.0 or USB 3.0 port
Computer with at least Intel Core i3 CPU
4. Brief Description and Characteristics
All settings can be changed in real-time
Buffer sizes/latencies from 32 up to 8192 samples selectable
4 channels 96 kHz/24 bit Record/Playback via ADAT optical (S/MUX)
2 channels 192 kHz/24 bit Record/Playback via ADAT optical (S/MUX4)
Clock modes slave and master
Automatic and intelligent master/slave clock control
Unsurpassed Bitclock PLL (audio synchronization) in ADAT mode
SteadyClock FS: Jitter-immune, super-stable digital clock
DDS technology for free setting of the sample rate
SyncAlign guarantees sample aligned and never swapping channels
SyncCheck tests and reports the synchronization status of input signals
TotalMix for latency-free submixes and perfect ASIO Direct Monitoring
TotalMix: 800 channel mixer with 46 bit internal resolution
TotalMix FX: 3-band EQ, Low Cut, Reverb, Echo, Compressor, Expander, Auto Level
1 x MIDI I/O, 16 channels high-speed Low-Jitter MIDI
1 x Hi-power low impedance headphone output
DIGICheck DSP: Level meter in hardware, peak- and RMS calculation
User's Guide Fireface UCX II © RME
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5. First Usage – Quick Start
5.1 Connectors – Controls – Display
The front of the Fireface UCX II features two instrument and microphone inputs, a stereo headphone output, a rotary encoder with push functionality, four buttons, a graphical colour display
and two status LEDs.
The Neutrik combo sockets of the two
Mic/Line inputs provide XLR and 6.3 mm /
1/4" TRS connection. They have LEDs for
phantom power (48V) indication.
Inputs 3/4, INST/LINE, accept both a balanced line signal as well as an unbalanced
instrument signal via 1/4" TRS plug.
The analog outputs 7 and 8 feed the headphones output Phones. This low impedance output of
highest quality is able to drive headphones at higher levels undistorted, no matter if low or high
impedance headphones are used.
The four keys and the encoder,
the high-resolution and clear col-
our display, and a well thoughtout menu structure enable the
user to quickly change and con-
figure the device’s settings com-
pletely without a computer. Help
notes and clear markers in the
display guide the user through all
functions.
When the Global Level Meter screen is shown, the rotary encoder sets the monitoring volume of
Main Out directly at the device. Pushing the button will change to Phones volume control, as
indicated in the right lower corner of the screen.
Digital State. On the right side the main screen shows the current sample rate and the state of
all digital input signals. WCK, SPDIF, AES and ADAT indicate a valid input signal separately for
each digital input. Additionally, RME's exclusive SyncCheck indicates if one of these inputs is
locked, but not synchronous to the others, in which case the corresponding field will flash. See
also chapter 8.7 / 14.2, Clock Modes - Synchronization. The field USB will change to CC when in
Class Compliant mode.
State MIDI. Between ADAT and USB two yellow lines indicate incoming and outgoing MIDI data.
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User's Guide Fireface UCX II © RME
The rear panel of the Fireface UCX II features 4 analog inputs and 6 analog outputs, the power
socket, USB, DURec (USB-A), word clock, MIDI I/O, ADAT I/O, and a connector for the included
breakout cable D-sub to XLR/RCA (SPDIF/AES I/O).
Balanced Line Level Inputs. 4 balanced analog inputs via 6.3 mm stereo TRS connectors.
Balanced Line Level Outputs. 6 balanced analog outputs via 6.3 mm stereo TRS.
AES/EBU & SPDIF. XLR. Via breakout cable the Fireface
UCX II supports both SPDIF coaxial as well as AES/EBU.
Word. BNC. Can be set to operate as word clock output
or input. The input can be terminated with 75 Ohms internally via Settings dialog, Options.
ADAT I/O. TOSLINK. Standard ADAT optical port, 8
channels. Can also be used as optical SPDIF input and
output, if set up accordingly in the Settings dialog.
DURec (Remote). Connector for USB stick or USB hard drive. Offers direct recording to / playback from the external memory device. Alternatively connector for the optional Advanced Remote Control USB (ARC USB) when the UCX II is used in stand-alone and Class Compliant
mode. This port can also be used instead of connecting the ARC USB to the computer.
USB 2.0. USB socket for connection to the computer. Compatible to USB 3.0.
MIDI I/O. Two 5-pin DIN connectors provide MIDI input and output.
Hook. Secure any loose cable by feeding it through the hook first.
Power. The included hi-performance switch mode power supply oper-
ates in the range of 100V to 240V AC at highest power efficiency. It is
short-circuit-proof, has an integrated line filter, is fully regulated
against voltage fluctuations, suppresses mains interference, and offers hum-free operation. It supplies 12 V DC at up to 2 A with the center pin + and outer pin GND.
The connector at the power supply and the socket at the unit come
with a turn to lock feature. When inserting the connector make
sure the little wings are aligned correctly so that the connector is
fully inserted. Then turn the connector so that it is locked and can no
longer be removed. If not fully inserted the connection will be loose
and cause power loss when the cable is moved.
User's Guide Fireface UCX II © RME
11
5.2 Quick Start
After the driver installation (chapter 6 / 13) connect the TRS jacks or the XLR inputs with the
analog signal source. The input sensitivity of the rear inputs can be changed in TotalMix (Input
Channel Settings, +13 dBu / +19 dBu and Gain), assuring the highest signal to noise ratio will be
achieved. Also try to achieve an optimum input level by adjusting the source itself. Raise the
source’s output level until the peak level meters in TotalMix reach about –3 dB.
The signal level of the front inputs can also be optimized directly at
the Fireface. The key MIC/GAIN gives direct access to this setting,
which is then controlled by the encoder VALUE.
The digital outputs of the Fireface UCX II provide AES/EBU, SPDIF
coaxial, SPDIF optical and ADAT optical at the respective ports.
On the analog playback side (the DA side), a coarse adjustment of
the analog output level at the rear jacks is again available in TotalMix
(Output Channel Settings, Level), or the Channel Settings directly at
the device. The big encoder VALUE controls the Main Out volume
(default: Line Out 1/2).
The output signal of channels 7/8, Phones, can also be controlled
directly from the VALUE encoder.
The Fireface UCX II can store and load its current state in 6 different
memory slots, called Setups (SETUP/REV, Options, Load/Store all
Settings). With this, the Fireface UCX II can be used stand-alone
after setting it up accordingly, replacing lots of dedicated devices (see
chapter 24).
In online mode some settings are greyed out, as these should be changed only at the computer,
in the Settings dialog or in TotalMix FX. These include the choice of sample rate and the mix
settings.
5.3 Menu and Navigation
The Fireface UCX II has a simple and clear menu structure, for fast and efficient operation directly at the device. In most cases, however, all settings will be done via the Settings dialog and
TotalMix FX of the host computer. The operation on the device is typically limited to a direct
adjustment of the monitoring volume (loudspeaker and headphones), the microphone gain, and
DURec (Direct USB Recording). In stand-alone mode, all settings are available directly on the
device.
Navigation through the menus of the display and control of the settings is done via four quick
select buttons and a rotary encoder with push function.
Default in the display is the Global Level Meter screen, which shows the current signal levels for
all I/Os. By pressing the encoder knob VALUE for half a second, only the analog I/Os (Analog
Level Meter screen) are displayed, which makes the level display larger and thus easier to read.
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User's Guide Fireface UCX II © RME
The Global and Analog Level Meter Screen on the far right also
shows:
The current sample rate
Clock mode and Lock/Sync status of the Word, SPDIF, AES
and ADAT inputs
MIDI I/O activity by two yellow dots
USB and Class Compliant mode active (CC)
Current output of the volume setting, dB value to it
DSP meter, shows the load of the DSP by activated FX
Turning the knob displays the volume screen of the currently
selected output. Pressing the knob toggles the display between
Main Out and Phones. At the bottom right, the current selection
and dB value of the Volume setting is shown, so it is visible even
when the Volume screen is not active.
The title bar shows the currently selected output and the assigned channels (Default Main is Line Out 1/2, Phones is fixed to
Line Out 7/8).
The quick select buttons MIC/GAIN, REC/PLAY, CHAN/MIX and SETUP/REV are described in
chapter 23.2.
Navigation
The Fireface UCX II has a simple and fast 1-button operation.
Pressing the VALUE encoder switches between adjusting the
parameter and moving horizontally through the menu to moving
vertically through the menu. Here is an example: the BNC socket’s mode is to be switched from Input to Output (or vice versa).
Press the SETUP/REV key. The Options menu appears. The
cursor is in the second line and has the button symbol. Turning
the encoder switches horizontally between the pages Clock,
Hardware/Diagnosis, Load/Store all Settings and Control Room.
After selecting Clock, press the encoder. The knob symbol
changes to double arrows. By turning the encoder, the cursor
now moves vertically through the menu.
Scroll down to BNC as WCK. Press the encoder so that the button symbol appears. Select the desired mode Input or Output by
turning the knob. Quickly exit the menu by pressing the
SETUP/REV button twice. Otherwise the menu will automatically
switch to the Level Meter screen after 90 seconds without any
user input.
User's Guide Fireface UCX II © RME
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5.4 Overview Menu Structure
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User's Guide Fireface UCX II © RME
5.5 Special Options
In the menu SETUP/REV - Options - Hardware/Diagnosis there are some additional setting options which are not described elsewhere in this manual.
Standalone ARC. For the optional ARC USB (Advanced Remote Control), when connected
directly to the UCX II, the following options are available:
Standalone ARC Volume. Deactivates all keys. Only the encoder wheel works, with a fixed
assignment to Main Volume.
This option is also a safety function in case the ARC USB is connected to the UFX+ / UFX II, but
operated online (with computer). When the system goes offline (computer removed, sleep
state…) the functions on the keys change, because online mode changed to stand-alone mode.
Operating the keys then could activate unintended functionality or changes.
Standalone ARC 1 s op
Each key has to be pressed for one second to activate the programmed functionality. This safety
function prevents unintentional changes. It can be stored within the Setups, activating this mode
automatically when such a Setup is loaded. When loading a Setup where this function had not
been active this mode is automatically deactivated at the UFX+ / UFX II.
Standalone ARC normal
Normal operation of the ARC USB.
Lock Keys. OFF, KEYS, ALL. Press SETUP/REV key for 2 seconds to unlock.
Remap Keys. OFF, ON. Allows assigning 28 different functions/actions to the four quick select
buttons on the device. The configuration is done in the following four entries:
MIC/GAIN, REC/PLAY, CHAN/MIX, SETUP/REV. Available functions/actions:
Default, Meter, Setup 1-6, DIM, Recall, Mute Enable, Main Mono, Main Mute, Main Out Low Cut,
Main Out EQ, Main Out Dynamics, Main Out AutoLevel, Phones Mute, Phones Low Cut, Phones
EQ, Phones Dynamics, Phones AutoLevel, Reverb enable, Echo enable, Record*, Play/Pause*
Stop*, Previous*, Next*. (* DURec functions).
The original function of the key on the device, calling up the menu, is still possible by pressing
the key on the device for a longer time (0.5 s).
Level Meters. All, Analog. Global Level Meter or Analog Level Meter screen. Same function as pressing the VALUE encoder for half a second.
Scroll Type. cw up, cw down. Allows changing the scroll direction when turning the encoder.
User's Guide Fireface UCX II © RME
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User's Guide
Fireface UCX II
Installation and Operation – Windows
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User's Guide Fireface UCX II © RME
6. Hardware, Driver and Firmware Installation
6.1 Hardware and Driver Installation
To simplify installation it is recommended to first install the drivers before the unit is connected to
the computer. But it will also work the other way round.
RME is constantly improving the drivers. Please download the latest drivers from the RME website. Driver version 4.30 or higher is available via http://rme.to/downloads. Unzip the downloaded file and start the driver installation with rmeinstaller.exe.
Start rmeinstaller.exe and follow the instructions of the installer. After installation connect computer and UCX II using a USB 2 cable. Windows detects the new hardware as Fireface UCX II
and installs the drivers automatically.
After a reboot, the icons of TotalMix FX and Settings dialog appear in
the notification area. If not a click on the chevron leads to the settings
that control the icon display.
Driver Updates do not require to remove the existing drivers. Simply install the new driver over
the existing one.
6.2 De-Installing the Drivers
A de-installation of the driver files is not necessary – and not supported by Windows anyway.
Thanks to full Plug & Play support, the driver files will not be loaded after the hardware has been
removed. If desired these files can then be deleted manually.
Unfortunately Windows Plug & Play methods do not cover the additional autorun entries of TotalMix, the Settings dialog, and the registration of the ASIO driver. Those entries can be removed from the registry through a software de-installation request. This request can be found
(like all de-installation entries) in Control Panel, Software. Click on the entry 'RME MADIface'.
6.3 Firmware Update
The Flash Update Tool updates the firmware of the Fireface UCX II to the latest version. It requires an already installed driver.
Start the program fut_usb.exe. The Flash Update Tool displays the current revision of the
Fireface firmware, and whether it needs an update or not. If so, then simply press the 'Update'
button. A progress bar will indicate when the flash process is finished (Verify Ok).
After the update the unit needs to be reset. This is done by powering down the unit for a few
seconds. A reboot of the computer is not necessary.
When the update unexpectedly fails (status: failure), the unit's Safety BIOS will be used from the
next boot on, the unit stays fully functional. The flash process should then be tried again.
User's Guide Fireface UCX II © RME
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7. Configuring the Fireface – Settings Dialog
7.1 General
Configuration of the Fireface UCX II is done via its own settings dialog. The panel Settings can
be opened by clicking on the fire or hammer symbol in the Task Bar's system tray.
The mixer of the Fireface UCX II, TotalMix FX, can be opened by
clicking on the DSP FX symbol in the Task Bar's system tray
The hardware of the Fireface UCX II offers a number of helpful practical functions and options to
suit many different requirements. The 'Settings' dialog includes options for:
Latency
Operation of the DSP
Configuration of the digital I/Os
Current sample rate
Synchronization behaviour
State of input and output
Any changes made in the Settings dialog
are applied immediately - confirmation
(e.g. by clicking on OK or exiting the
dialog) is not required.
However, settings should not be
changed during playback or record if it
can be avoided, as this can cause unwanted noises. Also, please note that
even in 'Stop' mode, several programs
keep the recording and playback devices
open, which means that any new settings might not be applied immediately.
The tab About includes information
about the current driver and firmware
version of the Fireface UCX II. About
offers four more options:
Lock Registry
Default: off. Checking this option brings
up a dialog to enter a password. Changes in the Settings dialog are no longer
written to the registry. As the settings are
always loaded from the registry when
starting the computer, this method provides an easy way to define an initial
state of the Fireface UCX II.
Enable MMCSS for ASIO activates support with higher priority for the ASIO driver. Note: At this
time, activating this option seems to be useful only with the latest Cubase/Nuendo at higher
load. With other software this option can decrease performance. The change becomes active
after an ASIO reset. Therefore it is easy to quickly check which setting works better.
Sort ASIO Devices
Changes the order only of the ASIO channels when using more than one interface.
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User's Guide Fireface UCX II © RME
Buffer Size (Latency)
The setting Buffer Size determines the latency between incoming and outgoing ASIO and WDM
data, as well as affecting system stability (see chapter 9.1).
USB Diagnosis indicates USB transmission errors. The display will be reset on any start of a
playback/record. More information can be found in chapter 40.3.
Output Format
Word – Single Speed
The word clock output signal usually equals the current sample rate. Selecting Single Speed
causes the output signal to always stay within the range of 32 kHz to 48 kHz. So at 96 kHz and
192 kHz sample rate, the output word clock is 48 kHz.
Optical
The optical TOSLINK output can operate as ADAT or SPDIF output. ADAT: includes channels
ADAT 1 to 8. SPDIF: includes channels SPDIF opt. L/R, in TotalMix ADAT ½. In SPDIF mode
Channel Status is fixed to Consumer.
SPDIF
The output SPDIF coaxial (RCA) can have the Channel Status Professional or Consumer. For
further details please refer to chapter 21.3.
Options
DSP - EQ+D for Record
Switches EQ and Dynamics of all input
channels into the recording path. In case
Loopback has been activated the EQ
and Dynamics of the Output channel are
within the recording path. See also chapter 27.6.
TMS activates the transmission of
Channel Status data and Track Marker
information on AES and SPDIF inputs.
In case these information are not required the feature should be turned off.
Word Clock In Termination
Checking this option terminates the word
clock input internally with 75 Ohms.
Word Clock Output
This option switches the BNC socket
into word clock output mode.
WDM Devices
Reduce the number of WDM devices to
the ones really needed to improve performance of the operating system.
User's Guide Fireface UCX II © RME
19
!
!
Clock Mode
Sample Rate
Sets the currently used sample rate. Offers a central and comfortable way of configuring the
sample rate of all WDM devices to the same value, as since Vista the audio software is no longer allowed to set the sample rate. However, an ASIO program can still set the sample rate by
itself.
During record/playback the selection is greyed out, so no change is possible.
Clock Source
The unit can be configured to use its own clock (Internal = Master), or one of the input signals
(Word, SPDIF, AES, ADAT). If the selected source isn't available (Input Status No Lock), the
unit will change to the next available one (AutoSync). If none is available then the internal clock
is used. The current clock source is displayed to the right.
Pitch
More information on Pitch is available in chapter 7.2.
Input Status
Indicates for each input (Word, SPDIF coaxial, AES, ADAT) whether there is a valid signal
(Lock, No Lock), or if there is a valid and synchronous signal (Sync). The third column shows the
sample frequency detected by the hardware (coarse recognition, 32 kHz, 44.1 kHz, 48 kHz etc.).
7.2 Pitch
Usually soundcards and audio interfaces generate their internal clock (master mode) by a
quartz. Therefore the internal clock can be set to 44.1 kHz or 48 kHz, but not to a value in between. SteadyClock, RME's sensational Low Jitter Clock System, is based on a Direct Digital
Synthesizer (DDS). This superior circuitry can generate nearly any frequency with highest precision.
The section Pitch includes both a list of typical video frequencies (so called pull up/pull down at
0.1% and 4%) and a fader to freely change the basic sample rate in steps of 1 Hz (!) over a
range of +/- 5%.
The Pitch function requires the Fireface to be in clock mode Master! The frequency setting
will only be applied to this one specific Fireface!
Changing the sample rate during record/playback often results in a loss of audio, or brings
up warning messages of the audio software. Therefore the desired sample rate should be
set at least coarsely before starting the software.
Coarse
Coarse modification in steps of 50 Hz
is done by clicking with the mouse to
the left and right of the fader knob.
Fine
Fine modification in steps of 1 Hz is
done by using the left/right cursor
keys.
Reset
Ctrl key plus left mouse click.
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Application examples
Pitch allows for a simultaneous change of speed and tune during record and playback. From
alignment to other sources up to creative effects – everything is possible.
Pitch enables you to intentionally de-tune the complete DAW. This way, the DAW can match
instruments which have a wrong or unchangeable tuning.
7.3 Option WDM Devices
The area WDM Devices gives configuration access, a status display showing the number of
currently enabled WDM devices, and a listbox to choose Stereo or Multi-Channel devices. The
number represents both record and playback devices, so ‘1’ means one input and one output
device.
WDM streaming is Microsoft's current driver and audio system, directly embedded into the operating system.
Several programs do not offer any direct device selection. Instead they use the playback device
selected in Windows under <Control Panel/ Sound/ Playback>.
Activating all 15 stereo devices at once may cause temporary freezing or ‘not responding’
effects. Therefore activate only the ones which are really needed.
After leaving the dialog with OK the WDM devices are reloaded so Windows sees their new
properties.
Multi-Channel using WDM
The WDM Streaming device Loudspeaker (Analog 1+2) of the RME driver can operate as usual
stereo device, or as up to 8-channel device. Using a multi-channel WDM device allows for the
use of multi-channel playback with specialized software as well as Surround sound from DVD or
Blu-Ray player software.
An 8-channel playback using the Windows Media Player requires the speaker setup 7.1 Sur-
round. Configure as follows: >Control Panel /Sound /Playback /Loudspeaker /Configure <.
8. Operation and Usage
8.1 Playback
In the audio application being used, Fireface UCX II must be selected as output device. This can
often be found in the Options, Preferences or Settings menus under Playback Device, Audio
Devices, Audio etc.
WDM playback devices are not available if the number of WDM devices is set to 0 in the
Settings dialog.
We recommend switching all system sounds off (via >Control Panel /Sounds<). Although the
Fireface UCX II comes with extensive support for system audio, setting it to be the Default De-
vice for playback could cause problems when working with ASIO.
Increasing the number and/or size of audio buffers may prevent the audio signal from breaking
up, but also increases latency i.e. output is delayed. For synchronized playback of audio and
MIDI (or similar), be sure to activate the checkbox ‘Get position from audio driver’.
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Note: Since Windows Vista the audio application can no longer control the sample rate under
WDM. Therefore the driver of the Fireface UCX II includes a way to set the sample rate globally
for all WDM devices within the Settings dialog, see chapter 7.1. As the change within the system
requires some time, record/playback should not be started immediately, but only after at least 5
seconds after a change.
Tip: the current CPU load can be used to determine if the audio subsystem has finished the reconfiguration.
8.2 DVD-Playback (AC-3/DTS)
Popular DVD software players can send their audio data stream to any AC-3/DTS capable receiver via the Fireface UCX II SPDIF output.
The sample rate must be set to 48 kHz in the UCX II Settings dialog, or the software will only
playback the down-mixed analog signal via SPDIF.
In some cases an UCX II output device has to be selected in >Control Panel / Sound / Playback< and be set as Default for the software to recognize it.
The DVD software's audio properties now show the options 'SPDIF Out' or similar. When selecting it, the software will transfer the non-decoded digital multichannel data stream to the Fireface.
Note: This 'SPDIF' signal sounds like chopped noise at highest level. Try to avoid mixing and
routing the signal to your loudspeakers, as they might get damaged.
Multichannel
DVD software player can also operate as software decoder, sending a DVD's multichannel data
stream directly to the analog outputs of the Fireface UCX II. For this to work select the WDM
playback device ’Loudspeaker’ of the Fireface UCX II in >Control Panel/ Sound/ Playback < as
Default.
The playback software’s audio properties now list several multichannel modes. If one of these is
selected, the software sends the decoded analog multichannel data to the Fireface UCX II. TotalMix can then be used to play back via any desired output channels.
The typical channel assignment for surround playback is:
1 – Left 2 – Right 3 – Center 4 - LFE (Low Frequency Effects)
5 - SL (Surround Left) 6 - SR (Surround Right)
Note 1: Selecting the Fireface to be used as system playback device is against our recommendation, as professional interfaces should not be disturbed by system events. Make sure to reassign the selection after usage or to disable any system sounds (tab Sounds, scheme 'No audio').
Note 2: The DVD player will be synced backwards from the Fireface. This means when using
AutoSync and/or word clock, the playback speed and pitch follows the incoming clock signal.
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8.3 Channel Count under WDM
The Fireface ADAT optical ports support sample rates of up to 192 kHz. For this to work singlechannel data is spread to two or four ADAT channels using the Sample Multiplexing technique.
This reduces the number of available ADAT channels from 8 to 4 or 2 per ADAT port.
Whenever the Fireface changes into Double Speed (88.2/96 kHz) or Quad Speed mode
(176.4/192 kHz) all devices no longer available vanish automatically.
WDM Stereo device
Double Speed
Quad Speed
Fireface Analog (1+2)
Fireface Analog (1+2)
Fireface Analog (1+2)
Fireface Analog (3+4)
Fireface Analog (3+4)
Fireface Analog (3+4)
Fireface Analog (5+6)
Fireface Analog (5+6)
Fireface Analog (5+6)
Fireface Analog (7+8)
Fireface Analog (7+8)
Fireface Analog (7+8)
Fireface SPDIF
Fireface SPDIF
Fireface SPDIF
Fireface AES
Fireface AES
Fireface AES
Fireface ADAT 1 (1+2)
Fireface ADAT 1 (1+2)
Fireface ADAT 1 (1+2)
Fireface ADAT 1 (3+4)
Fireface ADAT 1 (3+4)
Fireface ADAT 1 (3+4)
Fireface ADAT 1 (5+6)
Fireface ADAT 1 (5+6)
Fireface ADAT 1 (5+6)
Fireface ADAT 1 (7+8)
Fireface ADAT 1 (7+8)
Fireface ADAT 1 (7+8)
8.4 Multi-client Operation
RME audio interfaces support multi-client operation. Several programs can be used at the same
time. The formats ASIO and WDM can even be used on the same playback channels simultaneously. But as WDM uses a real-time sample rate conversion (ASIO does not), all active ASIO
software has to use the same sample rate.
However, a better overview is maintained by using the channels exclusively. This is no limitation
at all, because TotalMix allows for any output routing, and therefore a playback of multiple software on the same hardware outputs.
Inputs can be used from an unlimited number of WDM and ASIO software at the same time, as
the driver simply sends the data to all applications simultaneously.
RME's sophisticated tool DIGICheck is an exception to this rule. It operates like an ASIO host,
using a special technique to access playback channels directly. Therefore DIGICheck is able to
analyse and display playback data from any software, no matter which format it uses.
User's Guide Fireface UCX II © RME
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8.5 Analog Recording
For recordings via the analog inputs the corresponding record device has to be chosen (Fireface
UCX II Analog (x+x)).
The input sensitivity of the rear inputs can be changed in two steps and with adjustable gain in
TotalMix (Input Channel Settings, Level), assuring the highest signal to noise ratio will be
achieved. A further optimization can be achieved by adjusting the source itself. Raise the
source’s output level until the peak level meters in TotalMix reach about –3 dB.
The level of the front-side analog inputs can be optimized via TotalMix (Input Channel Settings,
Gain), or directly at the Fireface UCX II by the key Mic/Gain and the encoders 1/2. The multicolour level meters shown on the display also provide useful information about the current level
state.
Further information is found in chapter 19.
It often makes sense to monitor the input signal or send it directly to the output. This can be
done at zero latency using TotalMix FX (see chapter 25).
An automated control of real-time monitoring can be achieved by Steinberg’s ASIO protocol with
RME’s ASIO drivers and all ASIO 2.0 compatible programs. When 'ASIO Direct Monitoring' has
been switched on, the input signal is routed in real-time to the output whenever a recording is
started (punch-in).
8.6 Digital Recording
Unlike analog soundcards which produce empty wave files (or noise) when no input signal is
present, digital interfaces always need a valid input signal to start recording.
Taking this into account, RME added a comprehensive I/O signal status display to the Fireface
UCX II, showing sample frequency, lock and
sync status for every input, and several statusfields in the unit’s display.
The sample frequency shown in the fields Clock
Mode and Input Status of the Settings dialog is
useful as a quick display of the current configuration of the unit and the connected external
equipment. If no sample frequency is recognized, it will read ‘No Lock’.
This way, configuring any suitable audio application for digital recording is simple. After selecting
the correct input, Fireface UCX II displays the current sample frequency. This parameter can
then be changed in the application’s audio attributes (or similar) dialog.
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8.7 Clock Modes - Synchronization
In the digital world, all devices must be either Master (clock source) or Slave (clock receiver).
Whenever several devices are linked within a system, there must always be a single master
clock.
A digital system can only have one master! If the Fireface’s clock mode is set to 'Master', all
other devices must be set to ‘Slave’.
The Fireface UCX II utilizes a very user-friendly, intelligent clock control, called AutoSync. In
AutoSync mode, the system constantly scans the digital input for a valid signal. If any valid signal
is found, the Fireface switches from the internal quartz (Clock Source – Current Internal) to a
clock extracted from the input signal (Clock Source – Current ADAT, SPDIF, AES or Word). The
difference to a usual slave mode is that whenever the clock reference fails, the system will automatically use its internal clock and operate in clock mode Master.
AutoSync guarantees that record and record-while-play will always work correctly. In certain
cases however, AutoSync may cause feedback in the digital carrier, so synchronization breaks
down. To remedy this, switch the Fireface clock mode to ‘Internal’.
RME’s exclusive SyncCheck technology enables an easy to use check and display of the cur-
rent clock status. SyncCheck indicates whether there is a valid signal (Lock, No Lock) for each
input (Word Clock, SPDIF, ADAT, AES), or if there is a valid and synchronous signal (Sync).
See chapter 40.1.
Via Clock Source a preferred input can be defined. As long as the Fireface sees a valid signal
there, this input will be designated as the sync source, otherwise the other inputs will be scanned
in turn. If none of the inputs are receiving a valid signal, the Fireface automatically switches
clock mode to ‘Internal’.
Under WDM the Fireface will (has to) set the
sample rate. Therefore the error shown to the
right can occur. An AES, SPDIF or ADAT
signal with a sample rate of 48 kHz is used as sync source, but Windows audio had been set to
44100 Hz before. The red color of the text label signals the error condition, and prompts the user
to set 48000 Hz manually as sample rate.
Under ASIO the audio software sets the sample rate, so that such an error will usually not happen – but it can too. In slave mode the external sample rate has priority. Feeding 44.1 kHz will
prevent the ASIO software to set 48 kHz – obviously, as the only way to do so would be to enter
a different clock mode (Master/Internal).
In practice, SyncCheck provides the user with an easy way of checking whether all digital devices connected to the system are properly configured. With SyncCheck, finally anyone can master
this common source of error, previously one of the most complex issues in the digital studio
world.
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9. Operation under ASIO
9.1 General
Start the ASIO software and select ASIO MADIface USB as the audio I/O device or the ASIO
audio driver.
The Fireface UCX II supports ASIO Direct Monitoring (ADM).
The Fireface UCX II MIDI I/Os can be used with both MME MIDI and DirectMusic MIDI.
9.2 Channel Count under ASIO
At a sample rate of 88.2 or 96 kHz, the ADAT optical input and outputs operate in S/MUX mode,
so the number of available channels per port is reduced from 8 to 4. At a sample rate of 176.4
and 192 kHz, the ADAT optical input and output operates in S/MUX4 mode, so the number of
available channels is limited to 2.
Note: When changing the sample rate range between Single, Double and Quad Speed the
number of channels presented from the ASIO driver will change too. This may require a reset of
the I/O list in the audio software.
Single Speed
Double Speed
Quad Speed
Fireface Analog 1 to 8
Fireface Analog 1 to 8
Fireface Analog 1 to 8
Fireface SPDIF L / R
Fireface SPDIF L / R
Fireface SPDIF L / R
Fireface AES L / R
Fireface AES L / R
Fireface AES L / R
Fireface ADAT 1 to 8
Fireface ADAT 1 to 4
Fireface ADAT 1 to 2
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User's Guide Fireface UCX II © RME
9.3 Known Problems
If a computer does not provide sufficient CPU-power, and/or sufficient USB or PCI bus transfer
rates, and/or sufficient PCIe-bus transfer rates, then drop outs, crackling and noise will appear.
Raising the buffer size in the Settings dialog of the Fireface UCX II helps in most cases. It is also
recommended to deactivate all PlugIns to verify that these are not the reason for such effects.
Further information is found in chapter 40.3.
Another common source of trouble is incorrect synchronization. ASIO does not support asynchronous operation, which means that the input and output signals not only have to use the
same sample frequency, but also have to be in sync. All devices connected to the Fireface UCX
II must be properly configured for full duplex operation. As long as SyncCheck (in the Settings
dialog) only displays Lock instead of Sync, the devices have not been set up properly.
The same applies when using more than one Fireface UCX II - they all have to be in sync. Else
a periodically repeated noise will be heard.
RME devices support ASIO Direct Monitoring (ADM). Please note that not all programs support
ADM completely or error-free. The most often reported problem is the wrong behaviour of panorama in a stereo channel. Also try to avoid setting the TotalMix FX hardware outputs (third row)
to mono mode. This will most likely break ADM compatibility.
In case of a drift between audio and MIDI, or in case of a fixed deviation (MIDI notes placed
close before or behind the correct position), the settings in Cubase/Nuendo have to be changed.
At the time of print the option 'Use System Timestamp' should be activated. The Fireface UCX II
supports both MME MIDI and DirectMusic MIDI. It depends on the used application which one
will work better.
10. Using more than one Fireface UCX II
The driver supports up to three Fireface UCX II or a combination of up to three supported interfaces. All units have to be in sync, i.e. have to receive valid sync information (either via word
clock or by using AutoSync and feeding synchronized signals).
If one of the Firefaces is set to clock mode Master, all others have to be set to clock mode
AutoSync, and have to be synced from the master, for example by feeding word clock. The
clock modes of all units have to be set up correctly in the Fireface Settings dialog.
If all units are fed with a synchronous clock, i.e. all units show Sync in their Settings dialog,
all channels can be used at once. This is especially easy to handle under ASIO, as the ASIO
driver presents all units as one.
Please be aware that operating more than one Fireface UCX II may cause resource problems
on the computer side.
Note: TotalMix is part of the hardware of each Fireface. Up to three mixers are available, but
these are separated and can't interchange data. Therefore a global mixer for all units is not possible.
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11. DIGICheck Windows
The DIGICheck software is a unique utility developed for testing, measuring and analysing digital
audio streams. Although this Windows software is fairly self-explanatory, it still includes a comprehensive online help. DIGICheck 5.94 operates as multi-client ASIO host, therefore can be
used in parallel to any software, be it WDM or ASIO, with both inputs and outputs (!). The following is a short summary of the currently available functions:
Level Meter. High precision 24-bit resolution, 2/8/20 channels. Application examples: Peak
level measurement, RMS level measurement, over-detection, phase correlation measurement, dynamic range and signal-to-noise ratios, RMS to peak difference (loudness), long
term peak measurement, input check. Oversampling mode for levels higher than 0 dBFS.
Vertical and horizontal mode. Slow RMS and RLB weighting filter. Supports visualization according to the K-System.
Hardware Level Meter for Input, Playback and Output. Reference Level Meter freely con-
figurable, causing near zero CPU load, because calculated from the Fireface hardware.
Spectral Analyser. World wide unique 10-, 20- or 30-band display in analog bandpass-filter
technology. 192 kHz-capable!
Vector Audio Scope. World wide unique Goniometer showing the typical afterglow of a os-
cilloscope-tube. Includes Correlation meter and level meter.
Totalyser. Spectral Analyser, Level Meter and Vector Audio Scope in a single window.
Surround Audio Scope. Professional Surround Level Meter with extended correlation analy-
sis, ITU weighting and ITU summing meter.
ITU1770/EBU R128 Meter. For standardized loudness measurements.
Bit Statistics & Noise. Shows the true resolution of audio signals as well as errors and DC
offset. Includes Signal to Noise measurement in dB and dBA, plus DC measurement.
Channel Status Display. Detailed analysis and display of SPDIF and AES/EBU Channel
Status data.
Global Record. Long-term recording of all channels at lowest system load.
Completely multi-client. Open as many measurement windows as you like, on any chan-
nels and inputs or outputs!
DIGICheck is free but works only with RME interfaces. It is constantly improved and updated.
The latest version is always available on our website www.rme-audio.com, section Downloads
/ Software.
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12. Hotline – Troubleshooting
The newest information can always be found on our website www.rme-audio.com, section FAQ,
Latest Additions.
The 8 ADAT channels don’t show up at the optical output
The optical output has been switched to ‘SPDIF’. The ADAT playback devices are still usable
by routing and mixing them in TotalMix to other outputs.
Playback works, but record doesn’t
Check that there is a valid signal at the input. If so, the current sample frequency is displayed
in the Settings dialog.
Check whether the Fireface UCX II has been selected as recording device in the audio appli-
cation.
Check whether the sample frequency set in the audio application (‘Recording properties’ or
similar) matches the input signal.
Check that cables/devices have not been connected in a closed loop. If so, set the system’s
clock mode to Master.
Crackle during record or playback
Increase the number and size of buffers in the ‘Settings’ dialog or in the application.
Try different cables (coaxial or optical) to rule out any defects here.
Check that cables/devices have not been connected in a closed loop. If so, set the system’s
clock mode to ‘Master’.
Check the Settings dialog for displayed Errors.
Driver installation and Settings dialog/TotalMix work, but a playback or record is not possible
While recognition and control of the device are low bandwidth applications, playback/record
needs the full transmission performance. Therefore, defective USB cables with limited
transmission bandwidth can cause such an error scheme.
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User's Guide
Fireface UCX II
Installation and Operation – Mac OS X
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User's Guide Fireface UCX II © RME
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13. Hardware, Driver and Firmware Installation
13.1 Hardware and Driver Installation
After the Fireface has been connected to the computer and switched on install the drivers.
RME is constantly improving the drivers. Please download the latest drivers from the RME web-
site at http://rme.to/downloads. Unzip the downloaded file and start the driver installation by
double-clicking Fireface USB.pkg.
During driver installation the programs Totalmix (TotalMix FX) and Fireface USB Settings are
copied to the Applications folder. They will automatically start into the dock if a Fireface UCX II is
connected. A reboot of the computer is not required.
Driver Updates do not require to remove the existing drivers. Simply install the new driver over
the existing one.
For the latest M1 drivers for macOS please read the included readme carefully, as on
such machines the driver installation requires additional steps to enable third party
kernel extensions
13.2 De-installing the Drivers
In case of problems the driver files can be deleted manually by dragging them to the trash bin:
USB
/Applications/Fireface USB Settings
/Applications/Totalmix
/System/Library/Extensions/FirefaceUSB.kext
/Users/username/Library/Preferences/de.rme-audio.TotalmixFX.plist
/Users/username/Library/Preferences/de.rme-audio.Fireface_USB_Settings.plist
/Library/LaunchAgents/de.rme-audio.firefaceUSBAgent.plist
Under the latest Mac OS the User/Library folder is not visible in the Finder. To unhide it start
Finder, click on the menu item Go. Hold down the option (alt) key, then click on Library.
13.3 Firmware Update
The Flash Update Tool updates the firmware of the Fireface UCX II to the latest version. It requires an already installed Thunderbolt or USB driver.
Start the program Fireface USB Flash. The Flash Update Tool displays the current revision of
the UCX II firmware, and whether it needs an update or not. If so, simply press the 'Update' button. A progress bar will indicate when the flash process is finished (Verify Ok).
After the update the Fireface UCX II needs to be reset. This is done by powering down the
Fireface for a few seconds. A reboot of the computer is not necessary.
When the update fails (status: failure), the unit's second BIOS will be used from the next cold
boot on (Secure BIOS Technology). Therefore the unit stays fully functional. The flash process
should then be tried again on a different computer.
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