Cadac CDC seven Instructions for use

CDC seven
Digital Mixing Console
User Manual
Hardware

Cadac Holdings Ltd.
One New Street
Luton
Bedfordshire
LU1 5DX
United Kingdom
Telephone: [phone]
Fax: [phone]
Email:
General information: [email protected]
Service enquiries: [email protected]

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Important Safety Information
CAUTION: These servicing instructions are for use by qualied personnel
only. To reduce the risk of electric shock, do not perform any servicing
other than that contained in the User Manual unless you are qualied to do
so. Refer all servicing to qualied service personnel.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water. Do not expose this apparatus to dripping
or splashing and ensure that no objects lled with liquids, such as vases, are
placed on this apparatus.
6. Clean only with a dry cloth.
7. Do not block any of the ventilation openings. Install in accordance with the
manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves,
or other apparatus that produce heat.
9. Only use attachments/accessories specied by the manufacturer.
10. Refer all servicing to qualied service personnel. Servicing is required when
the apparatus has been damaged in any way, such as the power-supply cord or
plug is damaged, liquid has been spilled or objects have fallen into the apparatus,
the apparatus has been exposed to rain or moisture, does not operate normally,
or has been dropped.
11. To completely disconnect mains power from this apparatus, the power supply
cord must be unplugged.
For US and CANADA only:
Do not defeat the safety purpose of the grounding-type plug. A grounding-type
plug has two blades and a third grounding prong. The wide blade or the third
prong is provided for your safety. When the provided plug does not t into your
outlet, consult an electrician for replacement of the obsolete outlet.
The lightning ash with arrowhead symbol, within an equilateral triangle is
intended to alert the user to the presence of an uninsulated “dangerous voltage”
within the product’s enclosure that may be of sufcient magnitude to constitute a
risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to
the presence of important operating and maintenance (servicing) instructions in
the literature accompanying the appliance.

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General Precautions
• Do not place heavy objects on the control surface, expose it to sharp objects
or handle the console in any way that may cause damage, e.g., rough
handling and/or excessive vibration.
• Do not subject the equipment to dirt, dust, heat or vibration during operation
or storage. Never expose the console to rain or moisture in any form. Should
the console become wet, turn it off and disconnect it from the mains without
further delay. The console should be given sufcient time to dry out before
recommencing operation.
• When cleaning the console, never use chemicals, abrasive substances or
solvents.
• The console control panel should be cleaned using a soft brush and a dry
lint-free cloth. For persistent marks, use a soft cloth and isopropyl alcohol.
Switches and potentiometers do NOT require cleaning or lubrication.
• Keep these instructions for future reference. Follow all warnings in this
manual and those printed on the console.
• The console must be connected following the guidance in this manual. Never
connect power amplier outputs directly to the console. Connectors and
plugs must never be used for any other purpose than that for which they are
intended.
• The console mains input must always be connected to correctly rated mains
power as referred to in this manual. The mains input must, at all times, be
connected to the local mains power supply using the supplied power cord.
In cases where the supplied plug does not t, a qualied electrician must be
consulted.
• The power cord must be routed in such a way that the risks of accidentally
stepping on it, stretching it or it being pinched are minimized.
• WARNING ! THIS EQUIPMENT MUST BE EARTHED !
• Ventilation slots must never be covered or obstructed in any way, otherwise
airow required for safe operation may be restricted. Where the console is to
be operated in its ight-case, then this must be located in such a way that it
allows for proper ventilation.
• Refer servicing to qualied technical personnel only.

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Conformities
Declaration of Conformity
The Directives covered by this declaration: 2004/108/EC
The Products Covered by this Declaration: CDC seven audio mixing consoles
The Basis on which Conformity is being Declared: The products identied above
comply with the requirements of the above EU Directive(s) by meeting the
following standards:
BS EN 55103-1:2009 Product family standard for: audio, video, audio-
visual and entertainment lighting control apparatus for professional use.
Part 1 – Emission.
BS EN 55103-2:2009 Product family standard for: audio, video, audio-
visual and entertainment lighting control apparatus for professional use.
Part 2 – Immunity.
BS EN 61000-3 -2:2008 Electromagnetic Compatibility (EMC) Part 3.
Limits. Section 2. Limits for harmonic current emissions (equipment input
current ≤16 A per phase).
BS EN 61000-3 -3:2006 + A2:2009 Electromagnetic Compatibility (EMC)
Part 3. Limits. Section 3. Limitation of voltage uctuations and icker in low
voltage supply systems for equipment with rated current ≤16 A.
BS EN 60065:2002 + A1:2006 Audio, Video and similar electronic apparatus.
Safety requirements.
BS EN 61000-4-2:2009 Electrostatic discharge immunity test.
BS EN 61000-4-6:2009 Immunity to conducted disturbances.
BS EN 61000-4-11:2004 Immunity to voltage dips, short interruptions and
voltage variations.
Attention!
The attention of the specier, purchaser, installer, or user is drawn to
special measures and limitations to use which must be observed when
these products are taken into service to maintain compliance with the
above directives. Details of these special measures and limitations to use
are available on request, and are also contained in this User Manual.

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Contents
Important Safety Information 3
General Precautions 4
Conformities 5
Declaration of Conformity 5
Introduction 8
Overview 9
Shipping details 9
System capability 12
Data protocol: MegaCOMMS 13
CDC seven – Main Features 14
Hardware components 15
Control surface 15
Top view 15
Rear view 22
Channel Section 22
Master Section 24
Power supplies 25
Front panel 25
Remote Stageboxes 26
Connecting the hardware 28
Power supplies – control surface 28
Power supplies – remote stageboxes 28
Data communications: MegaCOMMS 28
Word Clock In 30
Word Clock Out 30
Remote stagebox – audio connections 30
Connector details 31
Surface and Local I/O – audio connections 32

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Principles of Operation 34
Switching the CDC seven on 34
Switching the CDC seven off 34
Main screens – touch operation 35
Layers and metering 35
Using the encoders 38
Channel blocks 39
Control Screen menus 40
System functions 41
Waves SoundGrid® interface 41
USB ports 41
Ethernet Ports 41
Video ports (HDMI) 41
GPIO ports 42
MIDI I/O 42
Lamp 43
Updating system software 43
System expansion 43
Adding a second Stagebox 43
Adding Redundant Power Supplies 43
Appendix 44
Technical Specications 44
Dimensions and weights 45
CDC seven control surface 46
Connecting the CDC seven to unbalanced sources and destinations 47

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Introduction
Thank you for purchasing this Cadac CDC seven digital audio mixing console.
From its founding in 1968, Cadac’s products have become the benchmark for
sound reinforcement consoles. The CDC seven is one of Cadac’s range of live
performance digital production consoles and uses the same innovative user
interface developed for the acclaimed CDC six console. It makes most of the
features of our world-famous, large-scale theatre and touring analogue desks
available in a compact, xed-architecture, fully-digital system, using a “high-
agility” user interface based a on wide-format touch screen. Professional sound
engineers used to working on either traditional analogue consoles, or other digital
consoles will nd the transition to the CDC seven’s operational system quick and
easy. However, the attention to detail, high quality audio circuitry and reliability
on which the reputation of the Cadac brand is built remains at the core of the
CDC seven’s design philosophy.

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Overview
The CDC seven system comprises three physical components: control surface,
control surface power supply, and remote MegaCOMMS I/O device(s). The control
surface provides further (local) analogue and digital inputs and outputs; back-up
(redundant) power supplies for the control surface and/or remote stagebox(es)
are available as a standard option.
Shipping details
As well as the control surface and remote I/O device(s) specied at the time of
ordering, the CDC seven is shipped with the following additional items:
• One or two* PSUs for the control surface
• One or two* powerCON TRUE 1 cables
• One or two* PSU-to-control surface cables
• Dust cover for control surface
• Gooseneck console lamp
• User manual – hardware
* A second (redundant) PSU may be ordered if required.
Control Surface:
The control surface is divided in four operational areas:
• two Channel Sections, each based around a 23.5”, 16:9 (1920 x 1080 pixels)
touchscreen display with two sets of rotary encoders mounted below and to
the right of the screen;
• the Master Section, to the right of the Channel Section, with the CDC seven’s
6.5” Control screen, fast access keypad, automation and other ancillary
controls;
• the Channel Fader Bay, below the Channel Section, with 16 touch-
sensitive,100 mm motorised faders, OLED channel displays, stereo LED
bargraph meters and other controls;
• the Master Fader Bay, below the Master Section, with four motorised faders,
OLED displays and a set of user-assignable keys.
All connections to the surface (apart from headphones and three USB ports) are
on the rear panel of the control surface: these include PSU inputs, MegaCOMMS
ports (see following page), local analogue and digital audio I/O, network ports,
further USB ports, etc.

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Remote MegaCOMMS I/O Devices:
Various versions of remote MegaCOMMS I/O devices are available:
• CDC MC Router – up to 3,072 channels of MegaCOMMS routing, including
gain compensation
• CDC MC MADI – 64 bidirectional channels of MADI I/O, including SRC
• CDC MC Dante – 64 bidirectional channels of Dante I/O, including SRC
• CDC MC AES3 – 18 x AES3 inputs, 18 x AES3 outputs (36 bidirectional
audio channels)
• CDC MC Optical – up to 512 audio channels via optical bre; 2 km drive
capability
• CDC I/O 6448 – 64 mic/line inputs and 48 balanced line outputs
• CDC I/O 3216 – 32 mic/line inputs and 16 balanced line outputs
CDC MC Router
CDC MC MADI
CDC MC DANTE
CDC MC AES
CDC MC Optical
CDC I/O 3216
CDC I/O 6448
Either one or two MegaCOMMS remote I/O devices can be connected directly to
the console: more may be connected by using the CDC MC Router.

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In addition to the I/O provided by the CDC MegaCOMMS remote I/O devices, the
control surface is provided with eight analogue mic/line inputs, eight analogue
line outputs (all balanced), four balanced AES/EBU inputs and four balanced
AES/EBU outputs. The routing of this local I/O may be congured via the CDC
seven’s software.
DESIGNEDAND ENGINEERED IN ENGLAND
12
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OUTPUTS
INPUTS
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Local I/O
System capability
The control surface contains all the system DSP, and apart from the local
analogue I/O, all audio signal paths and processing are in the digital domain. The
stageboxes contain Cadac’s high quality analogue microphone preampliers with
their gain and other parameters being remotely controlled, together with 96 kHz,
24-bit A-to-D and D-to-A conversion.
The CDC seven employs the now-familiar concept of “layering” to reduce the
size of the control surface, with 32 motorised faders able to control a maximum
console conguration of 96 input channels mixing into 48 assignable mix busses,
plus left, centre and right master busses, and two monitor busses for PFL and
AFL. The touchscreen-based control screens have been designed to present
as familiar a layout as possible to operators, using virtual control panels with
large, colour-coded buttons and displays. The rotary encoders at the edges of the
screen are used to make all parameter adjustments (levels, EQ parameters etc.)
An important feature of the CDC seven is that there is very little distinction
between input channels and output channels in terms of features and facilities.
The 48 mix busses are freely assignable as groups, auxiliary sends, matrix sends
or FX sends: all of these have fundamentally the same facilities as the input
channels, and are displayed and controlled in the same way.
The CDC seven control surface includes a Waves® SoundGrid® interface. Three
ports of the interface’s integral Ethernet hub are available on the rear panel;
any of these may be used to connect the CDC seven to a computer, allowing
multitrack recording and playback. The mixer may also be connected to a Waves
MultiGrid server running Waves plug-in signal processing, with the control panels
for the plug-ins presented on the CDC seven’s main screens. Alternatively, one
or two HDMI-capable external screens may be tted to the surface using the rear
VESA mounts, to display the Waves functionality independently.

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Data protocol: MegaCOMMS
Communication between the remote MegaCOMMS I/O devices and the control
surface is via a proprietary Cadac high speed protocol called MegaCOMMS,
using high-speed 75 ohm coaxial cable terminated in BNC connectors.
Two interconnection paths are provided, A and B, each of which requires a
transmit and receive cable. The maximum capacity of each path is 128 audio
channels in each direction.
The maximum recommended cable run between any two system components
(i.e., surface to I/O device, or between I/O devices) is 150 m (492 ft).

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CDC seven – Main Features
• Up to 96 simultaneous channels in the mix
• 48 mix busses, freely assignable as groups, aux sends or matrix sends, plus
LCR main busses
• Busses may also be allocated as sends to internal FX processors with
matching stereo returns
• Up to 192 simultaneous inputs and up to 192 simultaneous outputs
• 8 local analogue and 4 local AES3 inputs
• 8 local analogue and 4 local AES3 outputs
• Waves interface card providing 64ch. multitrack recording, or for connection
to a Waves MultiGrid server to access the full range of Waves plug-in
processing
• Unrestricted allocation of physical I/O to input channels and group/aux/matrix
outputs
• 16 VCA groups
• Eight user assignable buttons, with OLED displays (e.g., Mute group masters)
• Input channels may be linked or paired for stereo operation
• 100 mm motorised faders with OLED displays of current assignments
• All output types – groups, auxes or matrixes - may be mono or linked for
stereo operation
• Channel sends to outputs may be pre-EQ, pre-fade or post-fade (switchable
pre or post VCA)
• Default display of all primary channel parameters
• Two physical inputs per input channel
• 4-band fully-parametric EQ on all inputs and outputs
• Classic Cadac analogue EQ emulation
• Variable-frequency hi and lo-pass lters on all inputs and outputs
• 1/3-octave graphic equaliser available on all outputs
• Compressor/limiter with sidechain lter, plus gate on all input channels
• Compressor/limiter with sidechain lter on all outputs
• Adjustable delay on all inputs and outputs
• 16 stereo FX processors – each may be inserted or congured as send-
return loops
• Each FX processor provides reverb, delay and modulation, in any series/
parallel combination
• Switchable inserts on all channels
• Switchable LR and LCR panning
• Channel copy and swap functions
• Full Monitor, PFL and Talkback facilities
• 2 x 23.5” 16:9 touchscreen displays
• Scene automation with fast keypad access
• 96 kHz, 24-bit Delta-Sigma A/D and D/A converters
• Low-noise, wide dynamic-range analogue mic pre-amps with remote gain
control
• All channel functions immediately accessible by single touch
• Stereo bargraph meters, integrated in fader bays
• 9 control surface layers - 4 inputs, 3 outputs, VCAs, GEQ
• Gooseneck console lamp

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Hardware components
Control surface
Top view
Channel Section and Channel Fader Bay:
FADER FOLLOW
OUTPUTS
INPUT LAYERS
OUTPUT LAYERS
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1. Main Screen – a 23.5”, 16:9 high-denition touchscreen. The default
display shows a block of 16 consecutively numbered channels; alternative
sets of channels may be displayed by using the LAYER [12] buttons
or by “swiping” the screen horizontally. Touching any area in a channel
strip opens a virtual panel with controls for parameter adjustment and
enhanced displays. Switch functions are actioned by touching the virtual
“button”, rotary controls are mapped to the encoders adjacent to the
screen.

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2. Rotary encoders – 28 encoders are provided, 12 on the right-hand side of
the screen and 16 along the bottom (referred throughout this manual as
“right” and “lower” respectively). By default, the lower set are the channel
coarse mic gain controls, but may be changed to be channel pan controls
by the SWAP button [6].The right set is inactive until an on-screen panel is
opened; the function of each active encoder is then clearly indicated. The
function of the lower set may also change when certain channel panels
are opened. This is part of the functionality of the audio channel paths,
and is explained in greater detail in the CDC seven Software Manual.
3. SEL buttons – each displayed channel has a SEL button; these are used
in conjunction with the Copy [5] and Swap [6] buttons.
4. ISO - used in conjunction with the SEL buttons [3] when placing one or
more sections of a channel strip into RECALL SAFE mode.
5. Copy button – used in conjunction with the SEL buttons [3] when copying
channel settings from one channel to another.
6. Swap button – by default, the input blocks of the channel strips are
displayed at the bottom of the virtual channel strip and the pan blocks at
the top. The lower encoders are per-channel coase input gain controls
by default, but pressing Swap exchanges the on-screen positions of the
the input gain blocks and pan blocks, and reassigns the lower encoders
as the channel pan controls.
7. Faders – 16 touch-sensitive, 100 mm motorised faders; as with the SEL
and ON buttons, the channel the fader controls will be that displayed
directly above it on-screen, and will thus be affected by the currently
selected layer and any screen swiping or scrolling actions. As the
channels displayed on-screen are changed, the faders reposition to
follow the new channel set.
8. ON buttons – each fader has an ON button; when the button is unlit, the
channel currently displayed on-screen above it is muted. All channels
default to OFF on power-up. The ON button allows both ‘soft’ and ‘hard’
muting.
‘Soft’ mute – a short press mutes the channel’s output electronically
at the fader; any pre-fade sends in use will remain active. The ON
button is not illuminated.
‘Hard’ mute – a long press activates mute relays in the stagebox
for all physical outputs being fed by the channel. The ON button
ashes red in this state.

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9. SOLO buttons – perform either a PFL (pre-fade listen), AFL (after-fade
listen) or SIP (solo-in-place) function, depending on settings made through
the Solo Control page on the Control screen. The default modes for input
channels are: mono channels are PFL, stereo channels are AFL; output
channels are AFL only. AFL is post the channel panpot (if in circuit), so
correctly reects the stereo imaging of the channel being solo’d; if the
panpot is not in circuit, AFL is mono. SIP mode is also available, selected
from the Solo Control page. As well as the master modes, the CDC seven
also features ‘momentary’ and ‘latching’ solo operation:
‘Momentary’ solo – press and hold the SOLO button; solo is active
while the button is pressed and cancels when the button is released.
‘Latching’ solo – a short press on a SOLO button activates solo
mode and the button may be released. Press again to cancel.
‘Block latching’ – press and hold one SOLO button and press
another SOLO button while still pressing the rst. This will solo the
block of channels between the two buttons. Note that this mode is
not available if “Auto Cancel” is selected on the Solo Control page.
In use, the SOLO button illuminates in a colour that is mode-dependent.
See the Software Manual for more details of the Solo system.
10. Metering – a 20-segment LED dual bargraph meter is tted adjacent to
each of the 16 faders in the fader bay. The meters are single when the
selected channel (input or output) is mono, and dual if stereo. The lowest
segment acts as a ‘signal present’ LED, and illuminates at -70 dBFS.
The LEDs are colour coded: the signal present segment is green, the
ve highest segments are red, with the top one corresponding to 0 dBFS.
The remaining segments are yellow. A Meter Options page on the
Control screen allows the user to select various meter source options,
including xed metering of selected layers or “follow” modes, switchable
pre or post-fader. Full details are provided in the Software Manual. There
is additionally an green OPEN LED at the bottom of the meter which
illuminates as soon as the fader is moved from its “closed” position.
11. OLED alphanumeric displays – one per fader. These display the name of
the channel (input or output); this will either be the user-assigned name,
or if the channel has not been renamed, the default name – e.g., Ch. 23.
They are also colour-coded, to match the channel type – stereo or mono,
output buss assignment, etc. The colours are consistent with the usage
elsewhere in the software.
12. INPUT LAYERS and OUTPUT LAYERS buttons – a set of ten buttons
controlling which channels are displayed on-screen. The faders, OLED
displays and the ON, SOLO and SEL buttons below always follow the
on-screen channel strips above. The VCA button displays the VCA
assignment page, and the faders become VCA masters.
13. GEQ button – press this when an output bus is selected (with the SEL
button illuminated) to allow the CDC seven’s graphic equaliser function
for that bus. A 32-band graphic equaliser may be inserted in any or all
output channels, in addition to the channel’s standard parametric EQ.
When GEQ is in use, the OLEDs [11] display the centre frequencies of
each band.

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14. Fad. Fol. button – when active, the Fader Follow Outputs function allows
the operator to use the faders to control the bus send levels from the
currently selected input channel. An input channel layer must be selected
for Fader Follow Outputs to be available. The left-most channel in the
visible set, and busses 1 to 16 (Output Layer A) will be selected by
default: the SEL buttons select other channels, and the Output Layer
buttons select higher-numbered busses for control. While Fader Follow
Outputs is active, the screen display and rotary encoders continue to be
active for input channels.
15. Headphones – two ¼” stereo jacks are tted under the front armrest;
these carry the console’s Phones output. Each output has a volume
control.
16. USB ports – two type ‘A’ USB sockets are tted under the armrest for
rmware upgrades, exporting/importing Projects/Shows or plugging in a
keyboard. Many screen displays feature a “virtual” QWERTY keyboard,
but a hardware keyboard may be plugged in here and used, if preferred.

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Master Section and Master Fader Bay:
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1. PWR button – this is a multi-function “soft” button for starting and closing
down the console surface. See page 34 for more details.
2. Power rail indicators – six EXT PSU LEDs conrm the status of the
incoming DC supplies from the external PSU’s six further INT PSU LEDs
conrm the status of each internally-derived supply rail.
3. TALKBACK ENABLE – press to activate the console comms system.
The CDC seven has a very exible talkback system, which is congured
through setup options on the Control Screen. Any of the local (rear panel)
I/O may be assigned as a Talkback output or a Return Talkback input.
4. Control Screen – a 6.5” LCD touchscreen. By default the screen shows
the Cue List, but it can also display the console conguration options,
Show le management and provides access to numerous other user
features.
5. MUTE ALL – pressing this button will apply a ‘hard’ mute to all physical
outputs from the console. The button is not illuminated during the console’s
normal operation, and ashes red when active. Note that MUTE ALL is
automatically active when the surface powers up, and must be released
by pressing the button.
6. USB port – a type ‘A’ USB socket; this has the same functionality as the
two ports below the armrest; see [16] at page 18.
7. MENU button – when navigating the system menus, use this button to
return the Control Screen display to the home page. The MENU button is
disabled when the Cue List is in use.
8. BACK button – used in the menu system; navigates back one “level”.
Illuminates red when available.
9. CUE LIST button – pressing this displays the currently loaded Cue List
on the Control Screen.
10. Cue list controls – the ve buttons STORE, PREV, NEXT, and SCROLL
∧/∨are used in Cue List operations.
11. Numeric keypad – allows direct navigation to any cue in the Cue List.
12. UPDATE – updates the currently-selected Cue (in the Cue List).
13. MUTE – opens the channel assignment displays for the CDC seven’s
Mute Groups in the Main Screen. This is a toggle function, and a second
press reverts to the previously display.
14. SOLO CLEAR – used to clear SOLO selections from multiple channels
15. USER ASSIGN 1 to 8– these multi-function buttons are by default
the masters for the CDC seven’s Mute Groups. Other functions are:
global delay for the effects section, fast access to FX, VCA and Waves
Soundgrid® windows, talkback functions and User layers. The current
functions are displayed in the adjacent OLED displays, and are set up in
User Options section of the Control Screen.
16. LCR master fader – a 100 mm fader controlling the main stereo or LCR
output. This is a VCA master fader controlling all three master output
channels; the levels of the individual L, C and R legs may be controlled
by the MixLeft, MixCentre and MixRight faders of the master channels
which are accessed by swiping the display to below Output Channel 1 or
above Input Channel 64. This fader is not motorised.