Signal Processing and Functions
The audio processor of the AURATUS console consists of the XCMC, a compact 3U NEXUS plug-in card. The XCMC plug-in card accommodates the AURATUS mixer's audio processing, the complete I/O routing and the audio interfaces for connecting external devices. Power consumption is only 8 watts. The XCMC supports the sampling frequencies of 48 and 96 kHz without restrictions, i.e. the available mixer resources, channels and buses are always available.
Audio signal processing includes input routing, input channels of various types, different bus types, output channels that allow processing of the sum busses, and output routing. AURATUS has a fixed signal processing configuration. When working with different AURATUS mixer systems, the user uses identical mixer structures and largely similar user interfaces.
All signal processing is based on 40-bit floating point arithmetic. In addition to first-class sound quality for equalizer, filter and dynamics modules, this ensures that the internal signal processing of the mixing console is practically overload-proof. The AURATUS console can be operated as a pure stereo console or as a surround (5.1) console, depending on whether pure stereo projects or 5.1 projects are loaded.
The structure of the audio channels corresponds to the way analog systems think and work. In addition, restrictions have been lifted and additional functions provided to increase flexibility. The channels are made up of editing modules such as faders, EQ filter block, compressor, expander/gate, delay, limiter, insert, mute, etc. The channels can be used in a variety of ways.
The AURATUS bus system, which is integrated in the mixing console module, offers its own system in addition to the NEXUS TDM bus system. These group, summing, auxiliary and N-1 buses sum up the signals from the connected channels. All bus signals can be output unprocessed via NEXUS. The buses also have their own channels - so-called bus channels - which allow further signal processing and level adjustment of the bus signals.
AURATUS is equipped with a stereophonic and a 5.1 monitoring path (5.1 only in AURATUS multi-channel projects). Source selection is freely selectable for both monitor paths, and NEXUS signals can also be switched directly to the monitor channel. AURATUS offers various solo and PFL modes for monitoring a channel. A separate stereo bus is provided for PFL, and the Back-Stop-PFL (fader overpress function) and prioritized PFL functions are also possible. The solo function in AURATUS is fully multichannel capable. Depending on the selected configuration, a solo bus with up to 5.1 channels is available. In addition, signals present in the system can serve as monitoring sources: NEXUS inputs, inserts, channel outputs, mixer buses or direct outputs. The sources can be selected on customer-specific keypads in the monitor cassette and the channel cassette.
The AURATUS mixing console system is equipped with static automation, which allows the audio parameters of all editing channels to be saved and reloaded. The current parameter settings are stored as snapshots in the current project. Up to 99 snapshots, which can be individually named, can be managed within a project. AURATUS also allows the storage of partial snapshots in which only certain parameters are stored.
Logic Control" Control System
NEXUS Logic Control is a flexible, programmable logic system for switching and control functions that users can define according to their individual needs. Logic Control can be used to query various parameters of the NEXUS system, such as coupling point circuits, fader start contacts, input and output levels, and the signalling of internal system error states. Logic Control can control many different events, such as red light control, throat buttons, transmit switches, line level monitoring, automatic emergency circuits and command systems. AURATUS has 256 Logic Control inputs and outputs each.
Conference Call with N-1
With the N-1 system, complex conference calls can be realized. All commentators that are not "On Air" can communicate with each other. If one of them is dazzled in the current broadcast, it is automatically switched off in the conference. Only when his fader is closed can he participate in the conference again. Up to 8 N-1 buses can be configured individually in the AURATUS.
Offline Editor: AURATUS Configurations without Console
Users in changing production environments will appreciate the offline configuration options of the AURATUS because they bring time and cost advantages to productions with tight timing, for example on the OB truck or at live events.
With the offline editor, the configuration of an AURATUS can be prepared even if the console is not yet in use on site, but for another production. All work such as channel assignments, etc. is carried out in a stand-alone editor on a PC. Projects are then loaded into the console via SD cards. It also works the other way round: Projects are imported from the console and further edited in the offline editor.
In order to save space on a mixing console, control cables are often assigned several channels. In this case, however, only one audio channel is in the foreground and the other channels belonging to the control group are in the background. They are coupled and controlled during operation. If a channel is to be corrected from the background, the spill function helps. Pressing the Spill button brings all channels to the surface for editing. After the correction, the main layer is in the foreground again by pressing the spill button again.
The advantage of the spill function: The mixed project is better structured, the user can access all signals more quickly and retains an overview because he only has to work in the main layer - important for live operation. Normally, the definition of the layers for small digital consoles needs to be very well thought out, but thanks to the spill function, the division of the layers has become less important.
TREM - the Virtual Channel Extension
The virtual channel extension TREM simulates physically non-existent control strips on a remote PC connected to the console via Ethernet. All mixing tasks can be performed via the software, as the GUI simulates all control elements that could also be found on physical cassettes, including all metering, faders and knobs. The user can choose how large or small the manually operated console interface should be: In the minimum case, one fader unit with eight channel strips plus two knobs each and three buttons above each control strip is sufficient. Everything else can - if useful and desired - be transferred to the PC.
Down Mix Matrix
The independent "Down-Mix" matrix enables the conversion of a 5.1 multichannel signal into a stereo signal. The matrix, whose inputs and outputs are freely available in the NEXUS system, can be used, for example, for stereophonic monitoring of a multichannel mix or for downmixing a multichannel format. The input and output levels can be set separately for individual adaptation to the program material.
AURATUS Remote Control through Control Systems
Various functions, e.g. fader control, mute, panpot, PFL as well as fader panels, can be influenced by external control systems. AURATUS supports some protocols (e.g. the Ross Audio protocol from Ross Video Limited) in RS232 format.