Bedienungsanleitung Midas DL461 Router (Seite 48 von 64) (Englisch)

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34 Appendix C: XL8 Live Performance System

DL461 Router

Operator Manual

Control software

The XL8’s operating system is Linux, which is an open-source, stable, proven operating

system (OS). Linux is used in many mission-critical applications worldwide and has

allowed Midas’ software engineers to write a ground-up system that contains no

‘hidden’ or unused code. This has resulted in an efficient, compact application, which is

quick in operation, quick booting and comparatively easy to debug.

Two copies of the master control software run on separate processors to provide

resilience to failure.

GUI

The XL8 has five, daylight-viewable, TFT screens that provide overview and detail

status indication. Any screen can display any information but, in the standard

configuration, screen information relates to module location. So, the input module

screens display their module’s input status, the mix module screen displays the

overview status screen (‘all the meters all the time’) and the output module screen

display is used for general use, such as automation, effects, GEQs, third party screens

etc. This is dependent on the current application (concerts will probably be different to

theatre) and also operator preference.

The screens are controlled via the navigation zones at the front of the modules. In the

output module’s primary navigation zone, two trackballs control the output module

(right trackball) and the mix module (left trackball). The equivalent on each input

module is a dedicated glidepad. A keyboard slides out from underneath the output

module to provide further control, such inserting text. USB keyboard input sockets at

the front of the control centre (under the left and right modules) allow the input and

mix screens to be controlled via an external keyboard should the output module screen

fail.

Console linking

Two XL8 Control Centres can be linked together, as you can with Heritage consoles.

The bus outputs from one control centre feeds the bus inputs of the other, which is

done using AES50 links.

Integration of third party software

The XL8 network includes the capability to interface any third party hardware that uses

AES/EBU or AES50 digital audio, or a standard analogue audio interface.

Each XL8 AES/EBU input and output has a sample rate converter. Synchronisation to

external AES3 interfaces can be:

• Global - via inputs on the routers.

• Local to each input.

• Local to each output (synchronisation to adjacent local output).

Multiple local connections can be at different sample rates.

The use of the AES50 protocol for the transmission of digital audio means that any third

party digital audio hardware that features this connection can be connected to the

Midas network, and will transfer audio to and from the Midas hardware without any

additional interfaces or converters (provided it runs in TDM 96kHz mode). This will be

particularly useful as the protocol gains acceptance with recording and playback

devices, loudspeaker controllers, audio networking systems, digital amplifiers etc.

PC or MAC computers can use the Ethernet tunnel in the MidasNET system, and can

communicate with other computers on the network.

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