When the stagebox is connected to the CDC four:m or a CDC four, two extra “layer” buttons are enabled allowing access to the extra channels.
To connect a CDC four:m / four to an iPad you will need TabMix installed on the iPad, which can be downloaded from the Apple App Store, a wireless router and an Ethernet cable.
You should now have the console connected to the iPad.
The CDC four and CDC four:m can have an additional 32 mic / line analogue inputs with the addition of a CDC I/O 3216 stagebox. The stagebox also allows the 16 line outputs to be on stage. To connect the stagebox to the CDC four or CDC four:m it must have a MegaCOMMS card fitted.
The linked document provides Instructions on (a CDC four has a different procedure).
Click to open: Cadac-CDC four-m Battery Replacement-DOC2-June 2016
Below are the instructions on how to update the firmware on the CDC four:m:
1. First, make sure any scene memories are saved to a USB memory stick before updating the console.
2. Connect the CDC four:m to the internet via an RJ45 cable inserted into the Ethernet socket on the rear panel of the console.
3. Boot the CDC four:m into Maintenance Mode either by:
a. Switching on the console while pushing in the recessed switch labelled RESET on the back panel. Release the switch only when the Cadac logo is on the screen.
b. Or select SYSTEM / SYS SETTINGS / MAINTENANCE, enter the pin number “1969” using the ADJUST encoder and arrow buttons. Press ENTER to select OK. Press ENTER again.
4. When the CDC four:m is in Maintenance Mode, select NET UPDATE (press F5) and wait for message to report the update is complete.
5. Disconnect the RJ45 from the console.
6. Power cycle the unit twice to initialise the new firmware.
After this you should have the latest version of firmware on your console.
If you are finding that your CDC four or CDC four:m is recalling odd audio parameters when you are booting the console up, it maybe a sign of the internal backup battery failing.
The audio parameters of the CDC four and CDC four:m are stored in RAM memory, which is powered by a 3V lithium battery when the mains power is switched off. After a couple of years the battery will be below its optimum charge and this may result in unexpected audio parameters being recalled by the console when powered up.
We would therefore recommend that you change this battery for a new one every 12 months.
Below are links to specific instructions for replacing the internal on both the CDC four and CDC four:m:
Please note these instructions are model specific!
The login details for the customer repository are:
The CDC four:m uses two character “mnemonics” for the inputs and outputs that may be assigned to sockets on I/O stageracks. These can be seen in the Socket Assign page by pressing Function Button 3 labelled Assign Socket.
The mnemonics are:
|C17 to C48||Channels 17 to 48|
|MR, ML, MM||Master output right, left and mono|
|G1 to G4||Group output 1 to 4|
|A1 to A8||Aux send output 1 to 8|
|mL, mR, mM||Monitor Left, Right and Mono|
|TL, TR||Tape output, Left and Right|
|PL, PR||Phones output, Left and Right|
|M1 to M4||Matrix output 1 to 4|
Please Note: The local sockets on the rear panel of the CDC four:m are hard-wired and cannot be re-assigned.
MegaCOMMS is Cadac’s proprietary digital audio protocol.
MegaCOMMS is a robust, TDM (time division multiplex) system. Control data is embedded within the data stream, so that no audio channels have to be sacrificed for this purpose. The high bandwidth available means that the current implementation of MegaCOMMS can carry 128 channels of 24-bit, 96 kHz audio, plus control data, plus clock, bi-directionally, up to 150 metres via a pair of RG6 coaxial cables.
Cadac specify RG6 3G 75 Ohm 18 AWG solid bare copper, super high-resolution coaxial to ensure that the cable is capable of handling over 4 times the data required for MADI.
The CDC four:m has the addition of a 6 x 4 matrix, combining the 4 group outputs and the LR master into a further four outputs.
These outputs are part of the extended outputs from the CDC four:m which are only available if you use an I/O stagebox with more than 16 outputs (CDC I/O 6448, CDC MC MADI, CDC MC Dante etc.).
Select the CDC four:m output layer and press Function Button 3, labelled Assign socket. The Matrix outputs, M1 to M4, are assigned to sockets 25 to 28.
If you are using the CDC four:m with a CDC I/O 3216 stagebox these outputs may be reassigned to one of the 16 sockets available but this will entail giving up the outputs that are currently using them.
The glowing connectors on the rear of the console and on the rack mount units are MegaCOMMS ports.
The red – Rx – connectors are the receive or “in” ports and the blue – Tx – connectors are the transmit or “out” ports.
RG6 is a very robust cable and the BNC connectors used are professional grade connectors and we are not limited to 100m runs of Ethernet technology – MegaCOMMS will easily run up to 150m on coaxial.
No – unless the cables you are using are RG6 3G 75 Ohm 18 AWG solid bare copper, super high-resolution coaxial.
MegaCOMMS requires a cable that is capable of handling over 4 times the data needed for MADI.