14 Chapter 2: PRO1 Live Audio System
PRO1 Live Audio System
Operator Manual
AES standard allows straightforward interfacing with any third party hardware that also
utilises this connection.
AES50 and HyperMAC connections carry digital audio, control data and standard
Ethernet traffic bi-directionally down a single cable. Cat 5e cable is used for the ‘local’
(24-channel) connections. The combination of audio, control, clock and third party
Ethernet data in a single network means that the hardware interfaces on a single RJ45
connection.
All system connections are duplicated for full dual redundancy.
Resilience to failure (redundancy)
The PRO1 Control Centre uses the N+1 principle for the audio, where the AES50 cables
include a redundant spare.
The GUI screen can be used to operate the control centre, even if no control surface
hardware is working.
Latency management
In the interests of reduced latency the primary channel types are restricted to three
time zones and the interconnecting buses are restricted to the time in between.
• First time zone: Input channels, including aux inputs that are set to input channel
mode. (Aux bus time is here.)
• Second time zone: Aux channels, including aux inputs that are set to effects
return mode. (Master and matrix bus time is here.)
• Third time zone: Master and matrix outputs.
Operating system
The operating system of the PRO1 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.
GUI
The PRO1 has a daylight-viewable, TFT screen that provides overview and detail status
indication. The screen is operated using a trackball and two buttons that, between
them, provide the same control as provided by a computer’s mouse.
The supplied USB keyboard lets you insert text into pre-defined fields on the GUI
screen.
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